feat: request log 상태코드 범위 필터 추가 (min/max_status_code)

5xx 에러 필터를 status_code=500 (exact) 대신
min_status_code=500으로 변경해 500~599 전체 포함.

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

app/api/v1/endpoints/request_logs.py

@@ -50,7 +50,9 @@ async def get_request_logs(
     start_date: Optional[datetime] = Query(None, description="Filter by start date"),
     end_date: Optional[datetime] = Query(None, description="Filter by end date"),
     method: Optional[str] = Query(None, description="Filter by HTTP method"),
-    status_code: Optional[int] = Query(None, description="Filter by status code"),
+    status_code: Optional[int] = Query(None, description="Filter by exact status code"),
+    min_status_code: Optional[int] = Query(None, description="Filter by minimum status code (e.g. 500 for all 5xx)"),
+    max_status_code: Optional[int] = Query(None, description="Filter by maximum status code (e.g. 599 for all 5xx)"),
     endpoint: Optional[str] = Query(None, description="Filter by endpoint (supports wildcards)"),
     min_response_time: Optional[float] = Query(None, description="Minimum response time in ms"),
     max_response_time: Optional[float] = Query(None, description="Maximum response time in ms"),
@@ -74,6 +76,10 @@ async def get_request_logs(
         filters.append(RequestLog.method == method.upper())
     if status_code:
         filters.append(RequestLog.status_code == status_code)
+    if min_status_code:
+        filters.append(RequestLog.status_code >= min_status_code)
+    if max_status_code:
+        filters.append(RequestLog.status_code <= max_status_code)
     if endpoint:
         # Support wildcard matching
         if '*' in endpoint:

frontend/components/UnifiedLogViewer.tsx

@@ -93,7 +93,7 @@ const UnifiedLogViewer: React.FC = () => {
 
       // Filter by log type
       if (logType === 'errors') {
-        params.append('status_code', '500');
+        params.append('min_status_code', '500');
       } else if (logType === 'success') {
         params.append('status_code', '200');
       }