feat: add deployment_mode flag to API responses

tests/integration/test_api_deployment_flag.py

@@ -0,0 +1,41 @@
+import os
+import pytest
+from fastapi.testclient import TestClient
+
+
+def test_api_includes_deployment_mode_flag():
+    """Test API responses include deployment_mode field"""
+    os.environ["DEPLOYMENT_MODE"] = "DEV"
+
+    from api.main import app
+    client = TestClient(app)
+
+    # Test GET /health endpoint (should include deployment info)
+    response = client.get("/health")
+    assert response.status_code == 200
+    data = response.json()
+
+    assert "deployment_mode" in data
+    assert data["deployment_mode"] == "DEV"
+
+
+def test_job_response_includes_deployment_mode():
+    """Test job creation response includes deployment mode"""
+    os.environ["DEPLOYMENT_MODE"] = "PROD"
+
+    from api.main import app
+    client = TestClient(app)
+
+    # Create a test job
+    config = {
+        "agent_type": "BaseAgent",
+        "date_range": {"init_date": "2025-01-01", "end_date": "2025-01-02"},
+        "models": [{"name": "test", "basemodel": "mock/test", "signature": "test", "enabled": True}]
+    }
+
+    response = client.post("/run", json={"config": config})
+
+    if response.status_code == 200:
+        data = response.json()
+        assert "deployment_mode" in data
+        assert data["deployment_mode"] == "PROD"