/healthz now returns JSON with three-state JWT status: disabled
(DEX_ISSUER_URL unset), enabled (validator initialized), or
degraded (configured but init failed — only static-token auth
currently accepted). last_error surfaces the init failure so ops
can correlate with Dex outage windows.
Partial fix for #6. The cited internal/auth/jwt.go moved out
of this repo in 658f4ba (mcp-chassis migration); per-attempt
logging and 503 + WWW-Authenticate temporarily_unavailable
require chassis-side changes and a coordinated v0.1.1 bump
across all MCP consumers — tracked separately.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>