- Added UpdateSessionLastAccessed method to update session access time.
- Enhanced Authenticate method to support both session cookie and JWT token authentication.
- Introduced AuthResult struct to encapsulate authentication results.
- Added SetUserInContext function to simplify context management for authenticated users.

refactor(auth): streamline gRPC and HTTP authentication

- Removed gRPC authentication interceptor and replaced it with a unified approach using GatewayAuthMiddleware for HTTP requests.
- Updated Connect interceptors to utilize the new authentication logic.
- Consolidated public and admin-only method checks into service layer for better maintainability.

chore(api): clean up unused code and improve documentation

- Removed deprecated logger interceptor and unused gRPC server code.
- Updated ACL configuration documentation for clarity on public and admin-only methods.
- Enhanced metadata handling in Connect RPC to ensure consistent header access.

fix(server): simplify server startup and shutdown process

- Eliminated cmux dependency for handling HTTP and gRPC traffic.
- Streamlined server initialization and shutdown logic for better performance and readability.