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/scripts/test_nemotron_tool_calling.py

@@ -11,12 +11,11 @@ Nemotron Tool Calling 精準度測試
 日期: 2026-03-28 (台北時間)
 """
 
-import os
-import json
 import asyncio
+import json
+import os
 import time
 from dataclasses import dataclass
-from typing import Optional
 
 try:
     import httpx
@@ -198,11 +197,11 @@ class TestResult:
     test_id: str
     description: str
     success: bool
-    tool_called: Optional[str]
-    params: Optional[dict]
+    tool_called: str | None
+    params: dict | None
     latency_ms: float
-    error: Optional[str] = None
-    raw_response: Optional[str] = None
+    error: str | None = None
+    raw_response: str | None = None
 
 
 async def call_nemotron(prompt: str, model: str = "nvidia/nemotron-mini-4b-instruct") -> dict:
@@ -328,7 +327,7 @@ async def run_single_test(test_case: dict) -> list:
     prompt = test_case["prompt"]
 
     # 測試 Nemotron
-    print(f"    Testing Nemotron...", end=" ", flush=True)
+    print("    Testing Nemotron...", end=" ", flush=True)
     resp = await call_nemotron(prompt)
     if resp["error"]:
         results.append(TestResult(
@@ -341,7 +340,7 @@ async def run_single_test(test_case: dict) -> list:
             latency_ms=resp["latency_ms"],
             error=resp["error"]
         ))
-        print(f"❌ Error")
+        print("❌ Error")
     else:
         tool, params, error = parse_nemotron_response(resp["data"])
         success = tool == test_case["expected_tool"]
@@ -365,7 +364,7 @@ async def run_single_test(test_case: dict) -> list:
         print(f"{status} {tool} ({resp['latency_ms']:.0f}ms)")
 
     # 測試 Ollama
-    print(f"    Testing Ollama...", end=" ", flush=True)
+    print("    Testing Ollama...", end=" ", flush=True)
     resp = await call_ollama(prompt)
     if resp["error"]:
         results.append(TestResult(
@@ -404,7 +403,7 @@ async def main():
     print("🧪 Nemotron vs Ollama Tool Calling 精準度測試")
     print("=" * 70)
     print()
-    print(f"Nemotron API: integrate.api.nvidia.com")
+    print("Nemotron API: integrate.api.nvidia.com")
     print(f"Ollama URL: {OLLAMA_BASE_URL}")
     print()