refactor(proto): regenerate protos from proton#444 (gateway annotations removed)

Update PROTON_COMMIT to d93715a (proton PR #444) which removes all
openapiv2 and google.api.http annotations from frontier proto files.
These annotations were only used by the now-removed gRPC-gateway server.

Regenerated proto files are ~4,000 lines smaller as the openapiv2
metadata is no longer embedded in the Go code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: whoAbhishekSah

Makefile

@@ -4,7 +4,7 @@ TAG := $(shell git rev-list --tags --max-count=1)
 VERSION := $(shell git describe --tags ${TAG})
 .PHONY: build check fmt lint test test-race vet test-cover-html help install proto admin-app compose-up-dev
 .DEFAULT_GOAL := build
-PROTON_COMMIT := "330c7558f34570056814d418f99730fb45cfe80f"
+PROTON_COMMIT := "d93715a80b88bde03377ea2988849c6a207bfa20"
 
 admin-app:
 	@echo " > generating admin build"