Fix protobuf runtime panic on startup

Regenerated protobuf stubs and bumped google.golang.org/protobuf from
v1.36.10 to v1.36.11 to match protoc-gen-go v1.36.11. The version
mismatch caused a panic in filedesc.unmarshalSeed during init().

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vendor/google.golang.org/protobuf/internal/version/version.go

@@ -52,7 +52,7 @@ import (
 const (
 	Major      = 1
 	Minor      = 36
-	Patch      = 10
+	Patch      = 11
 	PreRelease = ""
 )