feat(auth): replace internal auth with JWT token service

- Replace InternalAuthService with TokenService using JWT tokens
- Add support for token issuance, refresh, verification and revocation
- Implement automatic signing key rotation with Redis storage
- Add database migration checks for indexes and foreign key constraints
- Update gRPC endpoints to use token-based authentication
- Remove deprecated API key based authentication system
- Add JSON Web Token support with HMAC-SHA256 signing
- Implement refresh token handling with automatic rotation
- Add token revocation by JTI and user ID
- Update build configuration to include core proto files
- Migrate database schema to handle token-based authentication
- Add comprehensive token validation and verification logic

api/internal/mod.rs

@@ -5,6 +5,6 @@ use actix_web::web;
 pub fn configure(cfg: &mut web::ServiceConfig) {
     cfg.service(
         web::scope("/internal")
-            .route("/api-keys", web::post().to(issue_api_key::issue_api_key)),
+            .route("/tokens", web::post().to(issue_api_key::issue_token)),
     );
 }