feat: smart recommendation generator with feedback loop and result checker

backend/app/db.py

@@ -63,6 +63,17 @@ def init_db() -> None:
         _ensure_column(conn, "recommendations", "tags",
                        "ALTER TABLE recommendations ADD COLUMN tags TEXT NOT NULL DEFAULT '[]';")
 
+        # ✅ 결과 채점용 컬럼 추가
+        _ensure_column(conn, "recommendations", "rank",
+                       "ALTER TABLE recommendations ADD COLUMN rank INTEGER;")
+        _ensure_column(conn, "recommendations", "correct_count",
+                       "ALTER TABLE recommendations ADD COLUMN correct_count INTEGER DEFAULT 0;")
+        _ensure_column(conn, "recommendations", "has_bonus",
+                       "ALTER TABLE recommendations ADD COLUMN has_bonus INTEGER DEFAULT 0;")
+        _ensure_column(conn, "recommendations", "checked",
+                       "ALTER TABLE recommendations ADD COLUMN checked INTEGER DEFAULT 0;")
+
+
         # ✅ UNIQUE 인덱스(중복 저장 방지)
         conn.execute("CREATE UNIQUE INDEX IF NOT EXISTS uq_reco_dedup ON recommendations(dedup_hash);")
 
@@ -261,3 +272,15 @@ def delete_recommendation(rec_id: int) -> bool:
         cur = conn.execute("DELETE FROM recommendations WHERE id = ?", (rec_id,))
         return cur.rowcount > 0
 
+def update_recommendation_result(rec_id: int, rank: int, correct_count: int, has_bonus: bool) -> bool:
+    with _conn() as conn:
+        cur = conn.execute(
+            """
+            UPDATE recommendations 
+            SET rank = ?, correct_count = ?, has_bonus = ?, checked = 1 
+            WHERE id = ?
+            """,
+            (rank, correct_count, 1 if has_bonus else 0, rec_id)
+        )
+        return cur.rowcount > 0
+