feat(api): add JobManager.add_job_warnings method

Store job warnings as JSON array in database.

Co-Authored-By: Claude <noreply@anthropic.com>

api/job_manager.py

@@ -148,7 +148,7 @@ class JobManager:
                 SELECT
                     job_id, config_path, status, date_range, models,
                     created_at, started_at, updated_at, completed_at,
-                    total_duration_seconds, error
+                    total_duration_seconds, error, warnings
                 FROM jobs
                 WHERE job_id = ?
             """, (job_id,))
@@ -168,7 +168,8 @@ class JobManager:
                 "updated_at": row[7],
                 "completed_at": row[8],
                 "total_duration_seconds": row[9],
-                "error": row[10]
+                "error": row[10],
+                "warnings": row[11]
             }
 
         finally:
@@ -189,7 +190,7 @@ class JobManager:
                 SELECT
                     job_id, config_path, status, date_range, models,
                     created_at, started_at, updated_at, completed_at,
-                    total_duration_seconds, error
+                    total_duration_seconds, error, warnings
                 FROM jobs
                 ORDER BY created_at DESC
                 LIMIT 1
@@ -210,7 +211,8 @@ class JobManager:
                 "updated_at": row[7],
                 "completed_at": row[8],
                 "total_duration_seconds": row[9],
-                "error": row[10]
+                "error": row[10],
+                "warnings": row[11]
             }
 
         finally:
@@ -236,7 +238,7 @@ class JobManager:
                 SELECT
                     job_id, config_path, status, date_range, models,
                     created_at, started_at, updated_at, completed_at,
-                    total_duration_seconds, error
+                    total_duration_seconds, error, warnings
                 FROM jobs
                 WHERE date_range = ?
                 ORDER BY created_at DESC
@@ -258,7 +260,8 @@ class JobManager:
                 "updated_at": row[7],
                 "completed_at": row[8],
                 "total_duration_seconds": row[9],
-                "error": row[10]
+                "error": row[10],
+                "warnings": row[11]
             }
 
         finally:
@@ -327,6 +330,32 @@ class JobManager:
         finally:
             conn.close()
 
+    def add_job_warnings(self, job_id: str, warnings: List[str]) -> None:
+        """
+        Store warnings for a job.
+
+        Args:
+            job_id: Job UUID
+            warnings: List of warning messages
+        """
+        conn = get_db_connection(self.db_path)
+        cursor = conn.cursor()
+
+        try:
+            warnings_json = json.dumps(warnings)
+
+            cursor.execute("""
+                UPDATE jobs
+                SET warnings = ?
+                WHERE job_id = ?
+            """, (warnings_json, job_id))
+
+            conn.commit()
+            logger.info(f"Added {len(warnings)} warnings to job {job_id}")
+
+        finally:
+            conn.close()
+
     def update_job_detail_status(
         self,
         job_id: str,
@@ -575,7 +604,7 @@ class JobManager:
                 SELECT
                     job_id, config_path, status, date_range, models,
                     created_at, started_at, updated_at, completed_at,
-                    total_duration_seconds, error
+                    total_duration_seconds, error, warnings
                 FROM jobs
                 WHERE status IN ('pending', 'running')
                 ORDER BY created_at DESC
@@ -594,7 +623,8 @@ class JobManager:
                     "updated_at": row[7],
                     "completed_at": row[8],
                     "total_duration_seconds": row[9],
-                    "error": row[10]
+                    "error": row[10],
+                    "warnings": row[11]
                 })
 
             return jobs

tests/unit/test_job_manager.py

@@ -419,4 +419,33 @@ class TestJobUpdateOperations:
         assert detail["duration_seconds"] > 0
 
 
+@pytest.mark.unit
+class TestJobWarnings:
+    """Test job warnings management."""
+
+    def test_add_job_warnings(self, clean_db):
+        """Test adding warnings to a job."""
+        from api.job_manager import JobManager
+        from api.database import initialize_database
+
+        initialize_database(clean_db)
+        job_manager = JobManager(db_path=clean_db)
+
+        # Create a job
+        job_id = job_manager.create_job(
+            config_path="config.json",
+            date_range=["2025-10-01"],
+            models=["gpt-5"]
+        )
+
+        # Add warnings
+        warnings = ["Rate limit reached", "Skipped 2 dates"]
+        job_manager.add_job_warnings(job_id, warnings)
+
+        # Verify warnings were stored
+        job = job_manager.get_job(job_id)
+        stored_warnings = json.loads(job["warnings"])
+        assert stored_warnings == warnings
+
+
 # Coverage target: 95%+ for api/job_manager.py