a1b2c3d fix: resolve race condition in connection pool
b2c3d4e feat: add rate limiting to API endpoints
c3d4e5f docs: update README with deployment instructions
d4e5f6a refactor: extract validation logic into separate module
e5f6a7b test: add integration tests for auth flow
f6a7b8c chore: bump dependencies to latest versions
a7b8c9d fix: handle null pointer in config parser
