fix: 修复证据上传审计并补充前端操作提示要求

app/service/risk_evidence_archive_service.py

@@ -9,6 +9,7 @@ from __future__ import annotations
 import io
 import os
 import re
+from datetime import UTC, datetime
 from hashlib import sha256
 from pathlib import Path
 from uuid import uuid4
@@ -129,6 +130,7 @@ class RiskEvidenceArchiveService:
                     "file_size": len(content),
                     "sha256": sha256(content).hexdigest(),
                 },
+                created_at=datetime.now(UTC).replace(tzinfo=None),
             ))
             await self.session.commit()
             committed = True