Feature/security rate limiting

[vicajohn]

Pull Request

Description

Related Issue

Closes #closes Synapse-bridgez#426

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test addition or update

Changes Made

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• All existing tests pass

Migration Safety (if applicable)

• Migration safety checker passes (./scripts/check-migration-safety.sh)
• Migration follows safe patterns (see docs/migration-safety.md)
• Migration tested with rollback
• Migration documented in PR description

Checklist

• My code follows the style guidelines (CONTRIBUTING.md)
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published

Pre-Submission Checks

• cargo fmt --all -- --check passes
• cargo clippy -- -D warnings passes
• cargo build succeeds
• cargo test passes

Screenshots (if applicable)

Additional Context

Reviewer Notes