fix(queue): 自动救援失活 Worker 遗留任务

新增基于任务状态、执行租约和 Worker 心跳的孤儿 River Job 精确识别，每 15 秒将确认失活的 Job 恢复为可重试，避免等待 River 一小时通用救援窗口。运行时恢复同步清除中断及终态任务的 admission、执行令牌和并发租约，防止状态残留污染队列指标。正常运行中的长任务仍由 running 状态和活跃心跳保护。验证通过完整 Go 测试、go vet、竞态检查、迁移安全检查和 PostgreSQL 18 集成测试。

apps/api/internal/store/rate_limits.go

@@ -16,6 +16,7 @@ type RuntimeRecoveryResult struct {
 	FailedAttempts            int64 `json:"failedAttempts"`
 	FailedTasks               int64 `json:"failedTasks"`
 	RequeuedAsyncTasks        int64 `json:"requeuedAsyncTasks"`
+	CleanedTaskAdmissions     int64 `json:"cleanedTaskAdmissions"`
 }
 
 var ErrConcurrencyLeaseLost = errors.New("concurrency lease lost")
@@ -549,6 +550,8 @@ SET status = 'queued',
     locked_by = NULL,
     locked_at = NULL,
     heartbeat_at = NULL,
+    execution_token = NULL,
+    execution_lease_expires_at = NULL,
     next_run_at = now(),
     finished_at = NULL,
     updated_at = now()
@@ -612,6 +615,24 @@ WHERE task.id = $1::uuid
 		}
 	}
 	result.RequeuedAsyncTasks = int64(len(asyncTaskIDs))
+	if len(asyncTaskIDs) > 0 {
+		tag, err = tx.Exec(ctx, `
+UPDATE gateway_concurrency_leases
+SET released_at = now()
+WHERE task_id = ANY($1::uuid[])
+  AND released_at IS NULL`, asyncTaskIDs)
+		if err != nil {
+			return RuntimeRecoveryResult{}, err
+		}
+		result.ReleasedConcurrencyLeases += tag.RowsAffected()
+		tag, err = tx.Exec(ctx, `
+DELETE FROM gateway_task_admissions
+WHERE task_id = ANY($1::uuid[])`, asyncTaskIDs)
+		if err != nil {
+			return RuntimeRecoveryResult{}, err
+		}
+		result.CleanedTaskAdmissions += tag.RowsAffected()
+	}
 
 	taskRows, err := tx.Query(ctx, `
 UPDATE gateway_tasks
@@ -620,6 +641,8 @@ SET status = 'failed',
     error_code = 'server_restarted',
     error_message = 'task interrupted by service restart',
     remote_task_payload = '{}'::jsonb,
+    execution_token = NULL,
+    execution_lease_expires_at = NULL,
     finished_at = now(),
     updated_at = now()
 WHERE async_mode = false
@@ -663,6 +686,26 @@ VALUES (
 		}
 	}
 	result.FailedTasks = int64(len(taskIDs))
+	tag, err = tx.Exec(ctx, `
+UPDATE gateway_concurrency_leases lease
+SET released_at = now()
+FROM gateway_tasks task
+WHERE lease.task_id = task.id
+  AND lease.released_at IS NULL
+  AND task.status IN ('succeeded', 'failed', 'cancelled')`)
+	if err != nil {
+		return RuntimeRecoveryResult{}, err
+	}
+	result.ReleasedConcurrencyLeases += tag.RowsAffected()
+	tag, err = tx.Exec(ctx, `
+DELETE FROM gateway_task_admissions admission
+USING gateway_tasks task
+WHERE admission.task_id = task.id
+  AND task.status IN ('succeeded', 'failed', 'cancelled')`)
+	if err != nil {
+		return RuntimeRecoveryResult{}, err
+	}
+	result.CleanedTaskAdmissions += tag.RowsAffected()
 
 	return result, tx.Commit(ctx)
 }