fix(api): 修復全部 lint 錯誤 (ruff --fix)

- Import sorting (I001)
- Unused imports (F401)
- f-string without placeholders (F541)
- Loop variable unused (B007)
- zip() strict parameter (B905)
- Exception chaining (B904)
- collections.abc imports (UP035)

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

apps/api/scripts/e2e_tool_call_verification.py

@@ -40,7 +40,6 @@ sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
 import httpx
 
-
 # =============================================================================
 # Config
 # =============================================================================
@@ -318,7 +317,7 @@ class E2EVerification:
                 found = any(a.get("id") == self.approval_id for a in approvals)
 
                 if found:
-                    print_success(f"Approval 在 pending 列表中")
+                    print_success("Approval 在 pending 列表中")
                     return True
                 else:
                     print_warn("Approval 不在 pending 列表 (可能已處理)")
@@ -356,7 +355,7 @@ class E2EVerification:
             # Phase 18.2.2: 動態簽署
             for i in range(min(remaining, len(SIGNER_POOL))):
                 signer = SIGNER_POOL[i]
-                print_info(f"Signing with", signer["name"])
+                print_info("Signing with", signer["name"])
 
                 async with httpx.AsyncClient(timeout=TIMEOUT) as client:
                     response = await client.post(