p2.7: prometheus /metrics

Default GET /metrics is Prometheus text; JSON stays at /metrics.json
and ?format=json. :8443 needs the metrics caller bearer; loopback
stays open. Restricted callers have no per-caller series and no
tavily:restricted gauge.

vendor/google.golang.org/protobuf/internal/genid/name.go

@@ -0,0 +1,12 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package genid
+
+const (
+	NoUnkeyedLiteral_goname  = "noUnkeyedLiteral"
+	NoUnkeyedLiteralA_goname = "XXX_NoUnkeyedLiteral"
+
+	BuilderSuffix_goname = "_builder"
+)