feat(fam-edge): 云端模型调用统计 - 新增 model_calls 表(provider/model/时间/耗时/成功/失败原因)，gemini/nvidia 每次请求经 model_call_hook 记录并随 sync delta 下发；gemini 支持模型级 model_timeouts（lite 实测22.6s×4≈90s）

fam-edge/src/fam_edge/oracle_db.py

@@ -81,8 +81,21 @@ class OracleDB:
             key TEXT PRIMARY KEY,
             value TEXT
         );
+        CREATE TABLE IF NOT EXISTS model_calls (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            provider TEXT,
+            model TEXT,
+            video_id INTEGER,
+            filename TEXT,
+            started_at TEXT,
+            duration_sec REAL,
+            success INTEGER DEFAULT 0,
+            error TEXT,
+            created_at TEXT
+        );
         CREATE INDEX IF NOT EXISTS idx_videos_updated ON videos(updated_at);
         CREATE INDEX IF NOT EXISTS idx_events_video ON events(video_id);
+        CREATE INDEX IF NOT EXISTS idx_model_calls_created ON model_calls(created_at);
         """)
         # 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()]
@@ -101,6 +114,20 @@ class OracleDB:
         cur = self._conn.execute("SELECT * FROM videos WHERE id=?", (video_id,))
         return cur.fetchone()
 
+    def record_model_call(self, provider: str, model: str,
+                          video_id, filename,
+                          started_at: str, duration_sec: float,
+                          success: bool, error: str = ''):
+        """记录一次云端模型调用（前端统计成功/失败/耗时/失败原因）"""
+        now = _now_iso()
+        self._conn.execute(
+            "INSERT INTO model_calls (provider, model, video_id, filename, "
+            "started_at, duration_sec, success, error, created_at) "
+            "VALUES (?,?,?,?,?,?,?,?,?)",
+            (provider, model, video_id, filename, started_at,
+             duration_sec, 1 if success else 0, error or '', now))
+        self._conn.commit()
+
     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:
@@ -220,6 +247,10 @@ class OracleDB:
         people = self._conn.execute(
             "SELECT * FROM people WHERE updated_at > ? ORDER BY id ASC", (since_iso,)
         ).fetchall()
+        # 模型调用统计（created_at >= since 配合 NAS 端幂等 upsert 防漏同秒记录）
+        model_calls = self._conn.execute(
+            "SELECT * FROM model_calls WHERE created_at >= ? ORDER BY id ASC",
+            (since_iso,)).fetchall()
 
         def _ser(row):
             d = dict(row)
@@ -229,6 +260,7 @@ class OracleDB:
             "videos": [_ser(v) for v in videos],
             "events": [_ser(e) for e in events],
             "people": [_ser(p) for p in people],
+            "model_calls": [_ser(m) for m in model_calls],
             "server_time": _now_iso(),
         }