chore: OpenTelemetry 디버그 로그 추가

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

blog_prj/wsgi.py

@@ -16,6 +16,7 @@ from django.conf import settings
 from django.core.wsgi import get_wsgi_application
 
 # DEBUG 모드 아닐 때만 OpenTelemetry 활성
+print(f"[OTEL] DEBUG={settings.DEBUG}, TRACE_ENDPOINT={settings.TRACE_ENDPOINT}")
 if not settings.DEBUG:
     import grpc
     from opentelemetry import trace
@@ -41,13 +42,16 @@ if not settings.DEBUG:
     # TRACE_CA_CERT 설정에 따른 gRPC credentials 구성
     credentials = None
     ca_cert_path = os.getenv('TRACE_CA_CERT', '').strip()
+    print(f"[OTEL] CA_CERT_PATH={ca_cert_path}, exists={os.path.exists(ca_cert_path) if ca_cert_path else False}")
     if ca_cert_path and os.path.exists(ca_cert_path):
         with open(ca_cert_path, 'rb') as f:
             ca_cert = f.read()
         credentials = grpc.ssl_channel_credentials(root_certificates=ca_cert)
         insecure = False
+        print(f"[OTEL] Using TLS with CA cert")
     else:
         insecure = True
+        print(f"[OTEL] Using insecure mode")
 
     otlp_exporter = OTLPSpanExporter(
         endpoint=settings.TRACE_ENDPOINT,
@@ -62,6 +66,7 @@ if not settings.DEBUG:
     trace.get_tracer_provider().add_span_processor(
         BatchSpanProcessor(otlp_exporter)
     )
+    print(f"[OTEL] OpenTelemetry initialized: service={settings.TRACE_SERVICE_NAME}, endpoint={settings.TRACE_ENDPOINT}")
 
     # Django 요청/응답 추적
     DjangoInstrumentor().instrument()