feat(security): enforce supply chain security for repository

[emmanuelknafo]

• Remove exposed Azure Storage key from appsettings.json files
• Update vulnerable NuGet packages (Microsoft.Data.SqlClient 5.2.0, System.Text.Json 8.0.5, Newtonsoft.Json 13.0.3)
• Enhance CODEOWNERS with security-sensitive path protection
• Update SECURITY.md with project-specific vulnerability reporting
• Add SBOM attestation to build workflow (SLSA Level 2+)
• Add container signing preparation to CI workflow
• Create comprehensive security documentation

Fixes #30

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA ccef2f6.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

OpenSSF Scorecard

Package	Version	Score	Details
actions/actions/attest-build-provenance	1.*.*	Unknown	Unknown
actions/actions/attest-sbom	1.*.*	Unknown	Unknown
nuget/Microsoft.Data.SqlClient	5.2.0	🟢 7	Details Check Score Reason Code-Review 🟢 9 Found 28/30 approved changesets -- score normalized to 9 Maintained 🟢 10 30 commit(s) and 8 issue activity found in the last 90 days -- score normalized to 10 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Security-Policy 🟢 10 security policy file detected Token-Permissions 🟢 9 detected GitHub workflow tokens with excessive permissions CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected License 🟢 10 license file detected Signed-Releases ⚠️ 0 Project has not signed or included provenance with any releases. Binary-Artifacts 🟢 10 no binaries found in the repo Branch-Protection 🟢 4 branch protection is not maximal on development and all release branches Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 Fuzzing ⚠️ 0 project is not fuzzed SAST 🟢 9 SAST tool detected but not run on all commits Vulnerabilities 🟢 10 0 existing vulnerabilities detected
nuget/Newtonsoft.Json	13.0.3	🟢 5.5	Details Check Score Reason Maintained 🟢 4 3 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 4 Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Packaging ⚠️ -1 packaging workflow not detected Token-Permissions 🟢 9 detected GitHub workflow tokens with excessive permissions Code-Review 🟢 4 Found 13/30 approved changesets -- score normalized to 4 CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected Security-Policy ⚠️ 0 security policy file not detected Binary-Artifacts 🟢 10 no binaries found in the repo License 🟢 10 license file detected Vulnerabilities 🟢 10 0 existing vulnerabilities detected Pinned-Dependencies ⚠️ 0 dependency not pinned by hash detected -- score normalized to 0 Fuzzing ⚠️ 0 project is not fuzzed Signed-Releases ⚠️ 0 Project has not signed or included provenance with any releases. Branch-Protection ⚠️ -1 internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md SAST 🟢 8 SAST tool detected but not run on all commits
nuget/System.Text.Json	8.0.5	🟢 6.1	Details Check Score Reason Code-Review 🟢 10 all changesets reviewed Maintained 🟢 10 30 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10 Packaging ⚠️ -1 packaging workflow not detected CII-Best-Practices ⚠️ 0 no effort to earn an OpenSSF best practices badge detected License 🟢 10 license file detected Security-Policy 🟢 10 security policy file detected Dangerous-Workflow 🟢 10 no dangerous workflow patterns detected Token-Permissions ⚠️ 0 detected GitHub workflow tokens with excessive permissions Signed-Releases ⚠️ -1 no releases found Branch-Protection 🟢 5 branch protection is not maximal on development and all release branches Binary-Artifacts ⚠️ 0 binaries present in source code SAST ⚠️ 0 SAST tool is not run on all commits -- score normalized to 0 Pinned-Dependencies ⚠️ 2 dependency not pinned by hash detected -- score normalized to 2 Fuzzing 🟢 10 project is fuzzed Vulnerabilities 🟢 9 1 existing vulnerabilities detected

Scanned Files

• .github/workflows/SCA-Microsoft-SBOM.yml
• src/webapp01/webapp01.csproj