Streamlined Keycloak configurations with defaults for development and production in `.env`. Added health checks and improved environment variable documentation with comments to differentiate local and server deployments. Ensured compatibility with pre-built registry images.
- Created `backend/infrastructure/security` module with standardized configurations for OAuth2, JWT validation, CORS, and role mapping.
- Updated ADRs to reflect resolved backend infrastructure decisions, including security standardization, persistence strategy, and Flyway schema location.
- Enabled integration of the `security` module into relevant projects (e.g., `ping-service` and `gateway`).
Applied a unified header format to all documentation files for better status identification, referencing, and ownership tracking. Archived outdated roadmaps, reports, and journal entries. Updated playbooks with new responsibilities, lifecycle rules, and consistent handover formats to align with the new archiving strategy.
