Temporarily instrument MCPAuthMiddleware to emit one log line per
on_call_tool and one per _extract_token. Needed to diagnose why
workspace-scoped JWTs forwarded by Pallas land on tool calls with
'Authentication required. Provide a Bearer token.'
Logs include header names, auth-header length+prefix, and the request
URL so we can tell in one turn whether the header is missing, present
but rejected, or get_http_request() raised. Also adds lowercase-bearer
tolerance for clients that normalize to lowercase.
Demote to DEBUG once the end-to-end path is green.
Robert Helewka
8b2e2068e0