feat: 添加 Bedrock API 客户端及 API 层增强

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/api/logging.ts

@@ -377,7 +377,7 @@ export function logAPIError({
   // Pass the span to correctly match responses to requests when beta tracing is enabled
   endLLMRequestSpan(llmSpan, {
     success: false,
-    statusCode: status ? parseInt(status) : undefined,
+    statusCode: status ? parseInt(status, 10) : undefined,
     error: errStr,
     attempt,
   })