feat(fam-edge): 视频生产-消费队列 - 新增 video_queue.py（生产者扫描新文件入队+重启恢复，独立消费者线程云端分析）；模型消费超时按原配置×timeout_multiplier(2)；failed 重试上限 max_retries(2)；删除旧 watch_processor

fam-edge/src/fam_edge/oracle_db.py

@@ -34,6 +34,7 @@ class OracleDB:
         self._conn = sqlite3.connect(db_path, check_same_thread=False)
         self._conn.row_factory = sqlite3.Row
         self._conn.execute("PRAGMA journal_mode=WAL")
+        self._conn.execute("PRAGMA busy_timeout=10000")
         self._init_schema()
 
     # ------------------------------------------------------------------
@@ -49,6 +50,7 @@ class OracleDB:
             duration_sec REAL,
             event_start_time TEXT,
             status TEXT DEFAULT 'pending',
+            retry_count INTEGER DEFAULT 0,
             summary_json TEXT,
             events_json TEXT,
             people_json TEXT,
@@ -82,6 +84,10 @@ class OracleDB:
         CREATE INDEX IF NOT EXISTS idx_videos_updated ON videos(updated_at);
         CREATE INDEX IF NOT EXISTS idx_events_video ON events(video_id);
         """)
+        # 兼容旧库：补 retry_count 列（生产-消费队列重试上限用）
+        cols = [r[1] for r in c.execute("PRAGMA table_info(videos)").fetchall()]
+        if 'retry_count' not in cols:
+            c.execute("ALTER TABLE videos ADD COLUMN retry_count INTEGER DEFAULT 0")
         self._conn.commit()
 
     # ------------------------------------------------------------------
@@ -91,6 +97,10 @@ class OracleDB:
         cur = self._conn.execute("SELECT * FROM videos WHERE filename=?", (filename,))
         return cur.fetchone()
 
+    def get_video_by_id(self, video_id: int) -> Optional[sqlite3.Row]:
+        cur = self._conn.execute("SELECT * FROM videos WHERE id=?", (video_id,))
+        return cur.fetchone()
+
     def ensure_video(self, filename: str, local_path: str,
                      camera_name: str = '', event_start_time: str = '',
                      duration_sec: float = 0.0, drive_file_id: str = '') -> int:
@@ -141,7 +151,8 @@ class OracleDB:
     def mark_video_failed(self, video_id: int, error: str = ''):
         now = _now_iso()
         self._conn.execute(
-            "UPDATE videos SET status='failed', summary_json=?, updated_at=? WHERE id=?",
+            "UPDATE videos SET status='failed', retry_count=retry_count+1, "
+            "summary_json=?, updated_at=? WHERE id=?",
             (error, now, video_id))
         self._conn.commit()