Return 503 for expired proxy tokens #10940

Job	Run time
Spellcheck / Codespell	14s
Codegen / Verify Code Generation	1m 4s
Security Scan / Go Vulnerability Check	1m 27s
Docs / Verify Swagger Documentation	2m 26s
License Headers / Check License Headers	21s
Security Scan / Grype Repository Scan	56s
Helm Charts / Lint and Test Helm Charts	4m 53s
Linting / Lint Go Code	1m 38s
Tests / Test Go Code (ubuntu-8cores-32gb)	5m 40s
E2E Tests / Build ToolHive Binary	2m 0s
Build Skills / Build and Publish Skills	2m 6s
Operator CI / Generate CRD Docs	42s
Operator CI / Generate CRDs	51s
Operator CI / Build Operator	1m 24s
Operator CI / Operator Tests Integration	3m 50s
Operator CI / Operator Tests	2m 20s
Operator CI / E2E Tests Operator (kindest/node:v1.34.3)	6m 33s
Operator CI / E2E Tests Operator (kindest/node:v1.33.7)	6m 34s
Operator CI / E2E Tests Operator (kindest/node:v1.35.1)	6m 30s
E2E Tests / E2E Tests Core (mcp-protocol)	6m 1s
E2E Tests / E2E Tests Core (core)	3m 15s
E2E Tests / E2E Tests Core (middleware)	5m 7s
E2E Tests / E2E Tests Core (api-registry)	1m 57s
E2E Tests / E2E Tests Core (mcp-run)	3m 55s
E2E Tests / E2E Tests Core (proxy)	5m 56s
E2E Tests / E2E Tests Core (api-clients)	2m 16s
E2E Tests / E2E Tests Core (api-workloads)	4m 2s
E2E Tests / E2E Tests Core (api-misc)	2m 6s
	1h 26m 4s

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