Chi requires middleware to be defined before routes. Moved
setupHealthEndpoints() from New() to Run() to allow callers to
add middleware before routes are registered.
Also:
- Updated rdev-api.yaml with DB env vars, RBAC, ServiceAccount
- Added Dockerfile.api.simple for pre-built binary deployment
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>