Review SCM files and security updates

[hyperpolymath]

• Fix critical bug in security-policy.yml: HTTP check was inverted (https -> http)
• Add legacy exception for extensions/vscode in rsr-antipattern.yml until ReScript conversion
• Improve guix.scm with proper synopsis and description
• Add optional database features (redis, surrealdb, arangors) with feature flags
• Fix unused variable warning in gitlab.rs (_payload -> payload)
• Make db modules conditionally compiled based on feature flags
• Update STATE.scm with current blockers (TypeScript conversion tracked)
• Add Cargo.lock for reproducible Nix builds

Description

Brief description of the changes.

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change fixing an issue)
• New feature (non-breaking change adding functionality)
• Breaking change (fix or feature causing existing functionality to change)
• Documentation update
• Refactoring (no functional changes)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code where necessary
• I have updated the documentation
• My changes generate no new warnings
• I have added tests that prove my fix/feature works
• All tests pass locally
• I have run cargo fmt and cargo clippy

Testing

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Screenshots (if applicable)

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