fix(caddy): forward X-Forwarded-Proto https on the /mcp proxy (#100)

Railway terminates TLS and Caddy sees plain HTTP, so the proto it forwards
to the API is "http" and the relay's GET health reply advertised
http://tronbrowser.dev/mcp/tron. Pin the header on the mcp route.


Claude-Session: https://claude.ai/code/session_018WGZpo8on6XLGYnccXV3dP

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

Author: ralyodio

Caddyfile

@@ -21,7 +21,11 @@
 	# is the static /.well-known/openmcp.json below, which is what makes the
 	# listing "verified" on a catalog (served from this origin, not registered).
 	@mcp path /mcp/* /mcp
-	reverse_proxy @mcp localhost:8090
+	reverse_proxy @mcp localhost:8090 {
+		# Railway terminates TLS and Caddy sees plain HTTP, so the proto it
+		# forwards is "http"; the relay's health reply echoes the caller's scheme.
+		header_up X-Forwarded-Proto https
+	}
 
 	# Security headers on every response.
 	header {