The backend.proto was updated to add FaceVerify and FaceAnalyze RPCs
(face detection support), but the Rust KokorosService was never updated
to match the regenerated tonic trait, breaking compilation with E0046:
not all trait items implemented, missing: `face_verify`, `face_analyze`
Stubs both methods as unimplemented, matching the pattern used for the
other RPCs Kokoros does not support.
Assisted-by: Claude:claude-opus-4-7 [Claude Code]
The backend.proto was updated to add AudioTranscriptionStream RPC, but
the Rust KokorosService was never updated to match the regenerated
tonic trait, breaking compilation with E0046.
Stubs the new streaming method as unimplemented, matching the pattern
used for the other streaming RPCs Kokoros does not support.
