- Replace the local /rpc Quart route with the shared ServiceLink blueprint helper.
- Move mesh scope enforcement into bearer_verifier via require_scope.
- Update ServiceLink tests to call the public handle_envelope and verify exports.
- Advance the servicelink submodule to include the shared CLI and RPC discovery work.
- Add the servicelink submodule and register POST /rpc for node-to-node file operations.
- Require bearer tokens with the mesh scope and apply rate/body-size limits to RPC calls.
- Map database connectivity failures to the existing 504 database error flow, with JSON responses for API routes.
- Cover the new RPC handlers and database error handling with focused pytest tests.
- Bump the NanoShare package version to 1.21.0.
daniel156161
