fix(api): 修復 34 個 Ruff lint 錯誤

- 自動修復 import 排序、unused imports
- 手動修復 raise from、isinstance union、unused variable
- scripts/ 暫時保留 (非 CI 阻擋)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/services/openclaw.py

@@ -1004,7 +1004,7 @@ class OpenClawService:
 
             # Step 2.5: 2026-03-29 ogt - 強制 confidence 必須由 LLM 輸出
             # 如果 LLM 沒有輸出 confidence，強制設為 0.5 並標記為 COLLAB
-            if "confidence" not in data or not isinstance(data["confidence"], (int, float)):
+            if "confidence" not in data or not isinstance(data["confidence"], int | float):
                 logger.warning(
                     "llm_missing_confidence",
                     raw_confidence=data.get("confidence"),