feat: P1 补齐（自动评审队列、自动化+分诊、并发 caps、运行时审批队列）

cloud/workers.py

@@ -62,10 +62,12 @@ def ensure_workers_table(db_path):
             "worker_id TEXT PRIMARY KEY, "
             "executor TEXT, "
             "capacity INTEGER, "
+            "running INTEGER, "
             "last_seen DOUBLE PRECISION, "
             "created_at DOUBLE PRECISION)"
         )
         conn.commit()
+        _ensure_running_column(conn)
         # 老库升精度只在确实是 Postgres REAL 列时做一次：每次心跳都
         # ALTER 会反复拿 ACCESS EXCLUSIVE 锁，没必要。先查
         # information_schema（SQLite 下这张表不存在，查询失败即跳过，
@@ -98,7 +100,59 @@ def ensure_workers_table(db_path):
         conn.close()
 
 
-def register_worker(db_path, worker_id, executor=None, capacity=1):
+def _ensure_running_column(conn):
+    """老库补 running 列（新表建表时已含该列）。
+
+    running 是 worker 上次心跳上报的当前占用槽数（启动中占位
+    也算，见 cloud/caps.py）；列缺失时 _worker_to_dict 默认 0，
+    所以补列失败只回滚、不抛，绝不炸注册与心跳。
+    SQLite 用 PRAGMA 查列，Postgres 用 information_schema。
+    """
+    try:
+        rows = conn.execute("PRAGMA table_info(workers)").fetchall()
+        names = set()
+        for row in rows:
+            try:
+                names.add(row[1])
+            except (IndexError, TypeError):
+                pass
+        if rows and "running" not in names:
+            conn.execute(
+                "ALTER TABLE workers ADD COLUMN running INTEGER DEFAULT 0")
+            conn.commit()
+        return
+    except Exception:
+        try:
+            conn.rollback()
+        except Exception:
+            pass
+    try:
+        row = conn.execute(
+            "SELECT COUNT(*) FROM information_schema.columns "
+            "WHERE table_name = 'workers' AND column_name = 'running'"
+            ).fetchone()
+        exists = bool(row and row[0])
+    except Exception:
+        try:
+            conn.rollback()
+        except Exception:
+            pass
+        return
+    if not exists:
+        try:
+            conn.execute(
+                "ALTER TABLE workers ADD COLUMN IF NOT EXISTS "
+                "running INTEGER DEFAULT 0")
+            conn.commit()
+        except Exception:
+            try:
+                conn.rollback()
+            except Exception:
+                pass
+
+
+def register_worker(db_path, worker_id, executor=None, capacity=1,
+                    running=None):
     """注册（或刷新）一个 worker：不存在 INSERT，存在 UPDATE。
 
     返回注册行 dict。worker_id 为空时抛 ValueError，调用方
@@ -112,14 +166,17 @@ def register_worker(db_path, worker_id, executor=None, capacity=1):
     try:
         cur = conn.execute(
             "UPDATE workers SET executor = ?, capacity = ?,"
-            " last_seen = ? WHERE worker_id = ?",
-            (executor, capacity, now, worker_id),
+            " running = ?, last_seen = ? WHERE worker_id = ?",
+            (executor, capacity, running if running is not None else 0,
+             now, worker_id),
         )
         if cur.rowcount == 0:
             conn.execute(
                 "INSERT INTO workers(worker_id, executor, capacity,"
-                " last_seen, created_at) VALUES(?, ?, ?, ?, ?)",
-                (worker_id, executor, capacity, now, now),
+                " running, last_seen, created_at)"
+                " VALUES(?, ?, ?, ?, ?, ?)",
+                (worker_id, executor, capacity,
+                 running if running is not None else 0, now, now),
             )
         conn.commit()
         row = conn.execute(
@@ -130,7 +187,8 @@ def register_worker(db_path, worker_id, executor=None, capacity=1):
     return _worker_to_dict(row)
 
 
-def heartbeat_worker(db_path, worker_id, executor=None, capacity=None):
+def heartbeat_worker(db_path, worker_id, executor=None, capacity=None,
+                     running=None):
     """心跳：就是带 last_seen 刷新的注册。
 
     executor/capacity 未给时保留旧值（已注册的 worker 只刷时间，
@@ -148,17 +206,19 @@ def heartbeat_worker(db_path, worker_id, executor=None, capacity=None):
         if row is None:
             conn.execute(
                 "INSERT INTO workers(worker_id, executor, capacity,"
-                " last_seen, created_at) VALUES(?, ?, ?, ?, ?)",
+                " running, last_seen, created_at)"
+                " VALUES(?, ?, ?, ?, ?, ?)",
                 (worker_id, executor, capacity if capacity is not None
-                 else 1, now, now),
+                 else 1, running if running is not None else 0, now, now),
             )
         else:
             old = _worker_to_dict(row)
             conn.execute(
                 "UPDATE workers SET executor = ?, capacity = ?,"
-                " last_seen = ? WHERE worker_id = ?",
+                " running = ?, last_seen = ? WHERE worker_id = ?",
                 (executor if executor is not None else old["executor"],
                  capacity if capacity is not None else old["capacity"],
+                 running if running is not None else old["running"],
                  now, worker_id),
             )
         conn.commit()
@@ -197,10 +257,12 @@ def _worker_to_dict(row):
             return row[name]
         except (KeyError, IndexError, TypeError):
             return None
+    running = _get("running")
     return {
         "worker_id": _get("worker_id"),
         "executor": _get("executor"),
         "capacity": _get("capacity"),
+        "running": running if running is not None else 0,
         "last_seen": _get("last_seen"),
         "created_at": _get("created_at"),
     }