Verify exact production traces and record rollout

apps/ai-service/config.py

@@ -25,6 +25,7 @@ class Settings(BaseSettings):
     model_config = SettingsConfigDict(env_file=".env", extra="ignore")
 
     app_name: str = "vsf-duoc-thu-ai-service"
+    environment: str = "local"
     qdrant_url: str = "http://localhost:6333"
     qdrant_collection: str = "duocthu_v1"
     qdrant_api_key: str | None = None
@@ -50,6 +51,13 @@ class Settings(BaseSettings):
     # never uses it.
     rerank_enabled: bool = False
     metrics_enabled: bool = True
+    # OpenTelemetry is opt-in so the existing EC2 Compose deployment keeps
+    # answering when no collector is present. Docker/Kubernetes observability
+    # profiles enable it and point OTLP/HTTP at their local collector Service.
+    otel_enabled: bool = False
+    otel_service_name: str = "ai-service"
+    otel_exporter_otlp_endpoint: str = "http://localhost:4318/v1/traces"
+    otel_sample_ratio: float = Field(default=1.0, ge=0.0, le=1.0)
     entities_path: Path = _default_entities_path()
     # F-08: a per-turn budget across RagAgent's sequential Bedrock calls
     # (understand, generate, one entailment check on the live agent path).