refactor: remove Sentry integration and replace with OpenTelemetry

Remove Sentry dependencies and configuration. Introduce monitoring 
setup for OpenTelemetry. Update logging to include log format 
options, and replace Sentry error handling middleware with 
monitoring handlers for GraphQL playground. Adjust environment 
variable handling to enhance configuration clarity and flexibility.

k8s/deploy.yaml

@@ -57,6 +57,8 @@ spec:
         - name: api
           containerPort: 8080
         envFrom:
+        - configMapRef:
+            name: schemas
         - secretRef:
             name: schemas
       restartPolicy: Always