Fix ExternalSecret API format and deployment env vars

- ExternalSecret: use key/property format (not path) for 1Password reference
- Deployment: remove admin password env var (use single vllm-api-key)
- Syncs vLLM API key from op://mk-labs/vllm/api-key

cluster/applications/body-wars/deployment.yaml

@@ -39,12 +39,6 @@ spec:
               name: body-wars-secret
               key: vllm-api-key
               optional: false
-        - name: OAUTH_ADMIN_PASSWORD
-          valueFrom:
-            secretKeyRef:
-              name: body-wars-secret
-              key: openwebui-admin-password
-              optional: false
         # Backend configuration for vLLM
         - name: OLLAMA_BASE_URLS
           value: "http://astro-orbiter:8000"