fix: auto-fix code issues (cron)

- 修复重复导入/字段 (llm_client.py 中的重复注释)
- 修复PEP8格式问题 (E501行长度超过100字符)
- 修复多行SQL语句和字符串格式化
- 修复f-string过长问题

涉及文件:
- backend/developer_ecosystem_manager.py
- backend/document_processor.py
- backend/enterprise_manager.py
- backend/export_manager.py
- backend/growth_manager.py
- backend/llm_client.py
- backend/localization_manager.py
- backend/main.py
- backend/neo4j_manager.py
- backend/ops_manager.py
- backend/performance_manager.py
- backend/plugin_manager.py
- backend/search_manager.py
- backend/security_manager.py
- backend/subscription_manager.py
- backend/tenant_manager.py
- backend/test_phase8_task6.py
- backend/test_phase8_task8.py
- backend/tingwu_client.py
- backend/workflow_manager.py

backend/subscription_manager.py

@@ -1108,7 +1108,8 @@ class SubscriptionManager:
             cursor.execute(
                 """
                 INSERT INTO usage_records
-                (id, tenant_id, resource_type, quantity, unit, recorded_at, cost, description, metadata)
+                (id, tenant_id, resource_type, quantity, unit, recorded_at,
+                 cost, description, metadata)
                 VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
             """,
                 (
@@ -1780,7 +1781,9 @@ class SubscriptionManager:
             cursor.execute(
                 """
                 UPDATE refunds
-                SET status = 'rejected', metadata = json_set(metadata, '$.rejection_reason', ?), updated_at = ?
+                SET status = 'rejected',
+                    metadata = json_set(metadata, '$.rejection_reason', ?),
+                    updated_at = ?
                 WHERE id = ?
             """,
                 (reason, now, refund_id),
@@ -1860,7 +1863,8 @@ class SubscriptionManager:
         cursor.execute(
             """
             INSERT INTO billing_history
-            (id, tenant_id, type, amount, currency, description, reference_id, balance_after, created_at, metadata)
+            (id, tenant_id, type, amount, currency, description,
+             reference_id, balance_after, created_at, metadata)
             VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
         """,
             (
@@ -1943,7 +1947,8 @@ class SubscriptionManager:
         amount = plan.price_yearly if billing_cycle == "yearly" else plan.price_monthly
 
         return {
-            "order_id": f"ALI{datetime.now().strftime('%Y%m%d%H%M%S')}{uuid.uuid4().hex[:8].upper()}",
+            "order_id": f"ALI{datetime.now().strftime('%Y%m%d%H%M%S')}"
+            f"{uuid.uuid4().hex[:8].upper()}",
             "amount": amount,
             "currency": plan.currency,
             "qr_code_url": f"https://qr.alipay.com/mock/{uuid.uuid4().hex[:16]}",
@@ -1963,7 +1968,8 @@ class SubscriptionManager:
         amount = plan.price_yearly if billing_cycle == "yearly" else plan.price_monthly
 
         return {
-            "order_id": f"WX{datetime.now().strftime('%Y%m%d%H%M%S')}{uuid.uuid4().hex[:8].upper()}",
+            "order_id": f"WX{datetime.now().strftime('%Y%m%d%H%M%S')}"
+            f"{uuid.uuid4().hex[:8].upper()}",
             "amount": amount,
             "currency": plan.currency,
             "prepay_id": f"wx{uuid.uuid4().hex[:32]}",