Monthly summary for 2025-10: Backend work delivered reliability, observability, and data-surface improvements across two repositories. Key outcomes include: 1) UUID Input Sanitization and Validation: introduced UuidifyString to sanitize inputs prior to database queries, added unit tests for UuidifyString and validation, and refactored createRepository and createSnapshot to ease test setup. 2) RBAC Middleware Improvements: reduced log noise for unauthorized requests, aligned API responses with authorization checks, and introduced a parameterized logger and adjusted log levels for more accurate HTTP status codes. 3) Aggregate table sizes across multiple schemas: extended the patchman-engine query to fetch sizes from public, inventory, and repack schemas; updated tests and test-running docs to reflect the schema expansion.