```

refactor(core,ai): 调整模块导入路径并移除废弃文件

- 修复 scheduler.py 中的导入路径错误，将 reports.service
  改为 reports.services
- 移除废弃的 app/core/background/task_queue.py 文件
- 移除废弃的 app/modules/ai_agent/adapters.py 文件
- 修复 ai_memory/service.py 中的导入路径错误，将
  events.service 改为 events.services
```

app/modules/legacy_mysql/services/common.py

@@ -0,0 +1,48 @@
+from datetime import date, datetime
+from decimal import Decimal
+from typing import Any
+
+from sqlalchemy.engine import RowMapping
+
+from app.modules.legacy_mysql.constants import LEGACY_SQL_TRAILING_TERMINATOR, LegacyQueryName
+
+FORBIDDEN_SQL_TOKENS = {
+    "insert",
+    "update",
+    "delete",
+    "drop",
+    "alter",
+    "truncate",
+    "create",
+    "replace",
+    "grant",
+    "revoke",
+}
+
+
+def _jsonable(value: Any) -> Any:
+    """Convert database scalar values into JSON-friendly values."""
+
+    if isinstance(value, (datetime, date)):
+        return value.isoformat()
+    if isinstance(value, Decimal):
+        return float(value)
+    return value
+
+
+def _row_to_dict(row: RowMapping) -> dict[str, Any]:
+    """Convert a SQLAlchemy row mapping to a serializable dictionary."""
+
+    return {key: _jsonable(value) for key, value in row.items()}
+
+
+def _normalize_sql(sql: str) -> str:
+    return " ".join(sql.strip().rstrip(LEGACY_SQL_TRAILING_TERMINATOR).split()).lower()
+
+
+def _query_name_text(query_name: str | LegacyQueryName | None) -> str:
+    if query_name is None:
+        return LegacyQueryName.PROJECTS.value
+    if isinstance(query_name, LegacyQueryName):
+        return query_name.value
+    return str(query_name)