✨ Add configuration for Code Review Automation and enhance .gitignore. Introduce .coderabbit.yml for automated reviews with profiles for correctness, maintainability, security, and performance. Update paths to include relevant directories and exclude generated files. Modify .gitignore to include coverage reports and generated files. Refactor Docker Compose to use updated paths for database initialization scripts. Update Go module dependencies and enhance Makefile with new code generation tasks. Transition domain models to a new DTO structure for better separation of concerns.

docs/observability.md

@@ -177,7 +177,7 @@ Tracing is configured via the `telemetry` section:
 The receiver reports two complementary sets of metrics:
 
 - **Prometheus metrics via `/metrics`**  
-  Implemented in `internal/observability/metrics`, covering:
+  Implemented in `internal/infra/metrics`, covering:
   - End-to-end message handling (`caatsm_messages_total`,
     `caatsm_handle_latency_seconds`, `caatsm_retries_total`)
   - DB activity (`caatsm_db_queries_total`,
@@ -223,7 +223,7 @@ Important attributes:
 
 ### Structured Logging Contract
 
-Logging is done with Zap. The `internal/observability/logging` package standardises fields via `MessageFields`:
+Logging is done with Zap. The `internal/infra/log` package standardises fields via `MessageFields`:
 
 - `service` – logical component (`caatsm-consumer`, `caatsm-processor` etc.).  
 - `transport_msg_id` – NATS/envelope message ID (derived from `Nats-Msg-Id` or JetStream sequence).