feat(ai_news): add news_sentiment.source column with migration

stock-lab/app/screener/schema.py

@@ -124,6 +124,7 @@ CREATE TABLE IF NOT EXISTS news_sentiment (
   tokens_input    INTEGER NOT NULL DEFAULT 0,
   tokens_output   INTEGER NOT NULL DEFAULT 0,
   model           TEXT NOT NULL DEFAULT 'claude-haiku-4-5-20251001',
+  source          TEXT NOT NULL DEFAULT 'articles',
   created_at      TEXT NOT NULL DEFAULT (datetime('now','localtime')),
   PRIMARY KEY (ticker, date)
 );
@@ -158,6 +159,15 @@ def ensure_screener_schema(conn: sqlite3.Connection) -> None:
                 "UPDATE screener_settings SET weights_json=?, node_params_json=? WHERE id=1",
                 (json.dumps(w), json.dumps(p)),
             )
+    # news_sentiment.source 컬럼 1회 추가 (기존 운영 환경)
+    cols = {r[1] for r in conn.execute(
+        "PRAGMA table_info(news_sentiment)"
+    ).fetchall()}
+    if "source" not in cols:
+        conn.execute(
+            "ALTER TABLE news_sentiment "
+            "ADD COLUMN source TEXT NOT NULL DEFAULT 'articles'"
+        )
     existing = conn.execute("SELECT id FROM screener_settings WHERE id=1").fetchone()
     if existing is None:
         now = datetime.now(timezone.utc).isoformat()