* [public-api] add dummy service for testing
* [public-api] proxy dummy to server
* [public-api] hello service server impl
* [server] fix API contribution bindings
* [dashboard] emulate unary call
* only if actually called
* [dummy] auth
* fix tests
* [server] add interceptor to public api
* add server side observability
* fix port name
* change to unimplemented for unknown methods
* [public-api] client metrics
* fix metrics imports
* align server metrics
* actually fix metrics
* add feature flags
* fix server side streams
* [dashboard] hook error reporting
* rebase and fix imports
* feature flagged metrics from dashboard
* revert GRPC_TYPE
* address feedback
