- Apply DeviceAuthMiddleware.Authenticate to /opds/devices/* routes
- OPDS now uses same authentication model as sync API (devices.auth_token)
- Removes security vulnerability allowing unauthorized device enumeration
- Update test expectations to require 401 for unauthenticated requests
- Fix query parameter name from 'query' to 'q' in search endpoints
- Update router comments to clarify authentication requirements
john-okeefe
c156176988