feat: add security security hardening features#55
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BREAKING CHANGE: Default token expiration reduced from 24 hours to 4 hours (AUTH_TOKEN_EXPIRATION_SECONDS: 86400 → 14400). Clients relying on the previous default must explicitly set AUTH_TOKEN_EXPIRATION_SECONDS=86400. Added comprehensive security hardening features: - Per-client rate limiting for authenticated endpoints (default: 10 req/sec, burst 20) - Configurable CORS support (disabled by default for server-to-server API) - New environment variables: RATE_LIMIT_ENABLED, RATE_LIMIT_REQUESTS_PER_SEC, RATE_LIMIT_BURST, CORS_ENABLED, CORS_ALLOW_ORIGINS - Rate limit middleware returns 429 Too Many Requests with Retry-After header - CORS middleware with configurable allowed origins Security documentation and guidance: - Added comprehensive security hardening guide (docs/operations/security-hardening.md) - Added security warnings for database SSL/TLS requirements in .env.example and docs - Updated production deployment guide with security hardening reference - Added API rate limiting reference (docs/api/rate-limiting.md) - Added API error decision matrix (docs/api/error-decision-matrix.md) - Updated all API endpoint docs with 429 status code behavior - Expanded troubleshooting guide with rate-limit and CORS diagnostics Release and operations documentation: - Added v0.5.0 release notes (docs/releases/v0.5.0.md) - Added v0.5.0 upgrade guide (docs/releases/v0.5.0-upgrade.md) - Added release compatibility matrix (docs/releases/compatibility-matrix.md) - Added production rollout golden path runbook (docs/operations/production-rollout.md) - Added quarterly operator drills runbook (docs/operations/operator-drills.md) - Added docs architecture map (docs/development/docs-architecture-map.md) - Added docs release checklist (docs/development/docs-release-checklist.md) - Added dashboard artifact templates (docs/operations/dashboards/) - Root-level CHANGELOG.md for project release history Enhanced API and policy documentation: - Expanded policy cookbook with persona templates and pre-deploy automation - Added retry/backoff examples for 429 handling in all language examples - Updated OpenAPI spec with 429 response modeling - Added OpenAPI validation to CI workflow - Added release docs CI guard (docs/tools/check_release_docs_links.py) - Expanded monitoring guide with rate-limit Prometheus queries and alerts Dependencies: - Added golang.org/x/time/rate for token bucket rate limiting - Updated go.mod and go.sum All version references updated from v0.4.1 to v0.5.0 across documentation and examples.
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BREAKING CHANGE: Default token expiration reduced from 24 hours to 4 hours (AUTH_TOKEN_EXPIRATION_SECONDS: 86400 → 14400). Clients relying on the previous default must explicitly set AUTH_TOKEN_EXPIRATION_SECONDS=86400.
Added comprehensive security hardening features:
Security documentation and guidance:
Release and operations documentation:
Enhanced API and policy documentation:
Dependencies:
All version references updated from v0.4.1 to v0.5.0 across documentation and examples.