fix(api): 產生 MCP PlayBook 修復候選

apps/api/src/services/approval_db.py

@@ -130,6 +130,11 @@ def approval_request_to_record_data(
     """
     Convert ApprovalRequestCreate to dict for ApprovalRecord creation
     """
+    metadata = dict(request.metadata or {})
+    preallocated_approval_id = str(metadata.pop("preallocated_approval_id", "") or "").strip()
+    if preallocated_approval_id:
+        UUID(preallocated_approval_id)
+
     blast_radius_dict = None
     if request.blast_radius:
         blast_radius_dict = {
@@ -151,7 +156,7 @@ def approval_request_to_record_data(
             })
 
     now = datetime.now(UTC)
-    return {
+    record_data = {
         "action": request.action,
         "description": request.description,
         "status": ApprovalStatus.APPROVED if risk_level == RiskLevel.LOW else ApprovalStatus.PENDING,
@@ -163,7 +168,7 @@ def approval_request_to_record_data(
         "dry_run_checks": dry_run_checks_list,
         "requested_by": request.requested_by,
         "expires_at": request.expires_at,
-        "extra_metadata": request.metadata,
+        "extra_metadata": metadata or None,
         "resolved_at": now if risk_level == RiskLevel.LOW else None,
         # 戰略 B: 告警風暴收斂
         "fingerprint": fingerprint,
@@ -177,6 +182,9 @@ def approval_request_to_record_data(
         # 原本缺失 → Playbook 人工審核後 trust score 永遠不更新（學習閉環斷鏈）
         "matched_playbook_id": getattr(request, "matched_playbook_id", None),
     }
+    if preallocated_approval_id:
+        record_data["id"] = preallocated_approval_id
+    return record_data
 
 
 def _record_value(value: Any) -> str: