Improve gRPC implementation #2027
Description
Problems
- Handle panics - nil pointer, database failures, type assertions
- Improve error responses - clients get connection drops instead of proper gRPC errors
- Missing authentication - need auth features for GoFr.
Solution Approach
- Panic Recovery Interceptor - catch panics, return relevant errors
- Authentication features - add basic auth.
- Add tests for panic recovery - test cases for the new interceptor functionality
- Documentation updates - error handling guidelines and examples
Goals
- Zero server crashes from handler panics
- Proper gRPC error responses for all failure modes
- Add auth features
- Tests for new features - panic recovery test coverage
- Updated documentation - error handling patterns and usage examples
- Add other miscellaneous features - this can be discussed later (rate limiting, request/response logging etc.)