feat(insta-lab): 발행 상태 컬럼 + set_slate_decision/list_recent_issued_topics

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

insta-lab/app/db.py

@@ -124,6 +124,13 @@ def init_db() -> None:
                     (cat, 1.0),
                 )
 
+        # 발행 상태 컬럼 (idempotent ALTER) — 자율 발급 파이프라인
+        cs_cols = [r[1] for r in conn.execute("PRAGMA table_info(card_slates)").fetchall()]
+        if "published_at" not in cs_cols:
+            conn.execute("ALTER TABLE card_slates ADD COLUMN published_at TEXT")
+        if "decision_at" not in cs_cols:
+            conn.execute("ALTER TABLE card_slates ADD COLUMN decision_at TEXT")
+
 
 # ── news_articles ────────────────────────────────────────────────
 def add_news_article(row: Dict[str, Any]) -> int:
@@ -217,6 +224,39 @@ def update_slate_status(slate_id: int, status: str) -> None:
         )
 
 
+def set_slate_decision(slate_id: int, decision: str) -> None:
+    """승인/반려 결정 기록. approved→published(+published_at), rejected→rejected.
+    멱등: 이미 published면 published_at 유지."""
+    now = "strftime('%Y-%m-%dT%H:%M:%fZ','now')"
+    with _conn() as conn:
+        if decision == "approved":
+            conn.execute(
+                f"UPDATE card_slates SET status='published', "
+                f"published_at=COALESCE(published_at, {now}), decision_at={now} "
+                f"WHERE id=?",
+                (slate_id,),
+            )
+        elif decision == "rejected":
+            conn.execute(
+                f"UPDATE card_slates SET status='rejected', decision_at={now} WHERE id=?",
+                (slate_id,),
+            )
+        else:
+            raise ValueError(f"invalid decision: {decision}")
+
+
+def list_recent_issued_topics(window_days: int = 14) -> List[Dict[str, Any]]:
+    """최근 window_days 내 published/rejected 슬레이트의 (keyword, category). dedup용."""
+    with _conn() as conn:
+        rows = conn.execute(
+            "SELECT keyword, category FROM card_slates "
+            "WHERE status IN ('published','rejected') "
+            "AND COALESCE(published_at, decision_at) >= datetime('now', ?)",
+            (f"-{int(window_days)} days",),
+        ).fetchall()
+    return [dict(r) for r in rows]
+
+
 def get_card_slate(slate_id: int) -> Optional[Dict[str, Any]]:
     with _conn() as conn:
         row = conn.execute("SELECT * FROM card_slates WHERE id=?", (slate_id,)).fetchone()