fix: Redis target_database隔离修复 - _parse_redis_commands使用ticket.target_database作为默认db编号，修复简单文本格式写死db=0的bug，确保工单提交到db1时数据正确写入db1

backend/app/api/v1/endpoints/ticket.py

@@ -1094,12 +1094,17 @@ async def _send_ticket_notification(
     instance_name = await _get_instance_name(db, ticket.instance_id)
     sql_preview = ticket.sql_content[:100] + "..." if len(ticket.sql_content) > 100 else ticket.sql_content
 
+    # Redis database 格式化: "0" → "db0"
+    target_db = ticket.target_database or ""
+    if ticket.db_type == "redis" and target_db.isdigit():
+        target_db = f"db{target_db}"
+
     notification_data = {
         "title": ticket.title,
         "ticket_id": ticket.id,
         "ticket_no": ticket.ticket_no or str(ticket.id),
         "db_type": ticket.db_type,
-        "target_database": ticket.target_database or "",
+        "target_database": target_db,
         "instance_name": instance_name,
         "sql_preview": sql_preview,
         "applicant": applicant_name,
@@ -1141,12 +1146,17 @@ async def _send_execution_notification(
     applicant_name = await _get_user_name(db, ticket.applicant_id)
     sql_preview = ticket.sql_content[:100] + "..." if len(ticket.sql_content) > 100 else ticket.sql_content
 
+    # Redis database 格式化: "0" → "db0"
+    target_db = ticket.target_database or ""
+    if ticket.db_type == "redis" and target_db.isdigit():
+        target_db = f"db{target_db}"
+
     notification_data = {
         "title": ticket.title,
         "ticket_id": ticket.id,
         "ticket_no": ticket.ticket_no or str(ticket.id),
         "db_type": ticket.db_type,
-        "target_database": ticket.target_database or "",
+        "target_database": target_db,
         "instance_name": instance_name,
         "sql_preview": sql_preview,
         "applicant": applicant_name,