chore: harden FOSS supply chain and release process

.github/ISSUE_TEMPLATE/bug.yml

@@ -0,0 +1,43 @@
+name: Bug report
+description: Report a reproducible defect
+title: "bug: "
+labels:
+  - bug
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        **Do not disclose suspected vulnerabilities here.**
+        Use the repository's private vulnerability reporting link instead.
+
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: What is wrong?
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Reproduction
+      description: Minimal steps or code needed to reproduce the problem.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+    validations:
+      required: true
+
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: Rust version, OS, target, crate version, enabled features, and relevant dependencies.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,6 @@
+blank_issues_enabled: false
+
+contact_links:
+  - name: Security vulnerability
+    url: https://github.com/LATTIX-IO/fheflow/security/advisories/new
+    about: Report suspected vulnerabilities privately. Do not disclose vulnerabilities in a public issue.

.github/ISSUE_TEMPLATE/feature.yml

@@ -0,0 +1,29 @@
+name: Feature request
+description: Propose a capability or API improvement
+title: "feat: "
+labels:
+  - enhancement
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem
+      description: What user, interoperability, security, or engineering problem needs to be solved?
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: Describe the desired behavior and API shape.
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+  - type: textarea
+    id: compatibility
+    attributes:
+      label: Compatibility and security impact
+      description: Note API compatibility, ecosystem interoperability, cryptographic, performance, or security implications.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,26 @@
+## Summary
+
+Describe the change and the problem it solves.
+
+## Scope
+
+- [ ] Change is focused and intentionally scoped.
+- [ ] Public API changes are documented.
+- [ ] Security implications have been considered.
+
+## Validation
+
+- [ ] `cargo fmt --all -- --check`
+- [ ] `cargo check --workspace --all-targets --all-features`
+- [ ] `cargo clippy --workspace --all-targets --all-features -- -D warnings`
+- [ ] `cargo test --workspace --all-features`
+- [ ] `cargo doc --workspace --all-features --no-deps`
+- [ ] Supply-chain / SemVer checks pass where applicable.
+
+## Compatibility
+
+Describe any API, behavior, wire-format, storage-format, cryptographic, or interoperability impact.
+
+## Security
+
+Describe new trust boundaries, unsafe behavior, cryptographic changes, input-handling changes, or security-relevant dependencies. Write `None` if not applicable.

.github/workflows/ci.yml

@@ -1,39 +1,65 @@
-name: ci
+name: Rust CI
 
 on:
   push:
     branches:
       - main
   pull_request:
+    branches:
+      - main
+  workflow_dispatch:
 
 permissions:
   contents: read
 
 jobs:
-  rust:
+  rust-checks:
     name: Rust checks
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v7
+      - name: Checkout repository
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803
+        with:
+          fetch-depth: 0
+          persist-credentials: false
 
-      - name: Install stable Rust
-        uses: dtolnay/rust-toolchain@stable
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@89b12181fb390509a0842a86cc55eeb8eb928c1d
         with:
           components: rustfmt, clippy
 
-      - name: Check formatting
+      - name: Cache Cargo
+        uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6
+
+      - name: Format
         run: cargo fmt --all -- --check
 
-      - name: Check workspace
-        run: cargo check --workspace --all-targets --all-features
+      - name: Check
+        run: cargo check --workspace --all-targets --all-features --locked
 
       - name: Clippy
-        run: cargo clippy --workspace --all-targets --all-features -- -D warnings
+        run: cargo clippy --workspace --all-targets --all-features --locked -- -D warnings
 
       - name: Test
-        run: cargo test --workspace --all-features
+        run: cargo test --workspace --all-features --locked
 
       - name: Documentation
-        run: cargo doc --workspace --all-features --no-deps
+        env:
+          RUSTDOCFLAGS: -D warnings
+        run: cargo doc --workspace --all-features --no-deps --locked
+
+      - name: Install supply-chain tools
+        run: |
+          cargo install --locked cargo-audit
+          cargo install --locked cargo-deny
+          cargo install --locked cargo-semver-checks
+
+      - name: RustSec audit
+        run: cargo audit
+
+      - name: Dependency policy
+        run: cargo deny check
+
+      - name: SemVer compatibility
+        run: cargo semver-checks check-release --workspace --all-features

.github/workflows/release-plz.yml

@@ -0,0 +1,42 @@
+name: Release-plz
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  release-plz-pr:
+    name: Release-plz PR
+    runs-on: ubuntu-latest
+
+    if: >-
+      ${{ github.repository_owner == 'LATTIX-IO' &&
+          github.ref == 'refs/heads/main' }}
+
+    permissions:
+      contents: write
+      pull-requests: write
+
+    concurrency:
+      group: release-plz-${{ github.ref }}
+      cancel-in-progress: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@89b12181fb390509a0842a86cc55eeb8eb928c1d
+
+      - name: Prepare release PR
+        uses: release-plz/action@18641b6c63063cc5ff8786ebf69cd57e8541bae1
+        with:
+          command: release-pr
+        env:
+          GITHUB_TOKEN: ${{ secrets.RELEASE_PLZ_TOKEN }}
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

CHANGELOG.md

@@ -0,0 +1,15 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The project follows Semantic Versioning once its public API reaches a stable contract. Pre-1.0 releases may evolve more rapidly, with breaking changes documented here.
+
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Fixed
+
+### Security

CODE_OF_CONDUCT.md

@@ -0,0 +1,21 @@
+# Code of Conduct
+
+Lattix open-source projects are technical communities built around professional, good-faith collaboration.
+
+## Expected behavior
+
+- Discuss ideas, implementations, and tradeoffs on their technical merits.
+- Be precise, constructive, and respectful in reviews and issue discussions.
+- Give contributors reasonable opportunity to explain or correct mistakes.
+- Respect security embargoes, responsible-disclosure processes, and project confidentiality requirements.
+- Do not harass, threaten, discriminate against, or deliberately disrupt other participants.
+
+## Unacceptable behavior
+
+Harassment, threats, discriminatory conduct, doxxing, deliberate disruption, malicious submissions, unauthorized disclosure of security-sensitive information, and repeated bad-faith behavior are not permitted.
+
+## Enforcement
+
+Project maintainers may edit or remove contributions, comments, issues, pull requests, or other participation that violates these expectations. Serious or repeated violations may result in temporary or permanent removal from Lattix project spaces.
+
+For private conduct reports, email secops@lattix.io. For suspected vulnerabilities, use the private reporting mechanisms documented in SECURITY.md.

SECURITY.md

@@ -12,4 +12,9 @@ Include enough information to reproduce and assess the issue, including:
 - expected and observed behavior;
 - potential security impact.
 
-Do not publicly disclose an unresolved vulnerability before coordinated disclosure.
+Do not publicly disclose an unresolved vulnerability before coordinated disclosure.
+## Private reporting fallback
+
+If GitHub Private Vulnerability Reporting is unavailable, email security reports to secops@lattix.io.
+
+Do not disclose suspected vulnerabilities through public GitHub issues, discussions, or pull requests.

SUPPORT.md

@@ -0,0 +1,15 @@
+# Support
+
+## Bugs and feature requests
+
+Use GitHub Issues for reproducible defects, feature proposals, documentation gaps, and implementation questions that are appropriate for public discussion.
+
+## Security issues
+
+Do not open a public issue for a suspected vulnerability.
+
+Use GitHub Private Vulnerability Reporting from the repository Security tab. If Private Vulnerability Reporting is unavailable, email secops@lattix.io.
+
+## Commercial support
+
+These repositories are open-source projects. Public issue trackers do not create a commercial support obligation or response-time commitment.

deny.toml

@@ -0,0 +1,31 @@
+[graph]
+all-features = true
+
+[advisories]
+yanked = "warn"
+unmaintained = "workspace"
+unsound = "workspace"
+
+[licenses]
+confidence-threshold = 0.8
+allow = [
+    "Apache-2.0",
+    "Apache-2.0 WITH LLVM-exception",
+    "MIT",
+    "BSD-2-Clause",
+    "BSD-3-Clause",
+    "ISC",
+    "Zlib",
+    "Unicode-3.0",
+    "MPL-2.0",
+]
+
+[bans]
+multiple-versions = "warn"
+wildcards = "deny"
+highlight = "all"
+
+[sources]
+unknown-registry = "deny"
+unknown-git = "deny"
+allow-git = []

release-plz.toml

@@ -0,0 +1,14 @@
+[workspace]
+changelog_update = true
+changelog_path = "./CHANGELOG.md"
+dependencies_update = true
+git_release_enable = true
+git_tag_enable = true
+semver_check = true
+release_always = false
+pr_branch_prefix = "release-plz-"
+pr_labels = ["release"]
+
+[changelog]
+protect_breaking_commits = true
+sort_commits = "newest"