fix(openclaw): import path 修正 — src.models.ai (非 openclaw_schema)

IDE 正確抓到的 bug(非 false positive),SuggestedAction 在 src/models/ai.py。
_SA.NO_ACTION 現在能正確降級。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/api/src/services/openclaw.py

@@ -1346,7 +1346,7 @@ Trace URL: {signoz_trace_url}
                     result.target_resource = "unknown(hallucinated)"
                     # Pydantic enum 處理: 若不能直接賦 str 就跳過
                     try:
-                        from src.models.openclaw_schema import SuggestedAction as _SA
+                        from src.models.ai import SuggestedAction as _SA
                         result.suggested_action = _SA.NO_ACTION
                     except Exception:
                         pass