feat(builder): repair existing templates, a weekly check that queues repairs, and eval

The builder could only create games; nothing noticed when a live template
stopped working, and there was no way to tell whether a builder change made
it better or worse.

- repair -id ID: boots an existing template as nodes run it; if it fails,
  the same investigation as for a draft runs and the model changes only what
  the diagnosis says. The worker handles "repair" jobs (gameId from the
  panel) and opens "fix(games): repair ..." on draft/<id>; a template that
  boots as it is reports "nothing to repair" and opens no PR. The boot and
  fix loop is now shared by builds and repairs.
- validate.yml runs weekly and boot-tests every game; failed games are sent
  to the panel (X-GBR-Event: games_boot_failed) to queue repairs.
- eval -ids all: builds games that already have a template from scratch,
  blind, and scores each draft against it (boots, same image and app, ports,
  ready line, settings found) into eval.md and eval.json.
- research skips our own sites, so neither research nor eval reads our
  templates back.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cmd/gbrgames/main.go

@@ -9,7 +9,9 @@
 //	go run ./cmd/gbrgames draft -name N -image I   # have an AI model write a new game's template from those facts
 //	go run ./cmd/gbrgames research -name N         # find how a game's server runs: variants, images, Steam app
 //	go run ./cmd/gbrgames build -name N -variant V # first boot, draft, and boot the draft until it works
-//	go run ./cmd/gbrgames worker                   # take research/build jobs from the panel (see BUILDER.md)
+//	go run ./cmd/gbrgames repair -id ID            # fix an existing template that no longer boots
+//	go run ./cmd/gbrgames eval -ids all            # build known games blind and score the drafts
+//	go run ./cmd/gbrgames worker                   # take research/build/repair jobs from the panel (see BUILDER.md)
 package main
 
 import (
@@ -41,6 +43,10 @@ func main() {
 		err = runResearch(os.Args[2:])
 	case "build":
 		err = runBuild(os.Args[2:])
+	case "repair":
+		err = runRepair(os.Args[2:])
+	case "eval":
+		err = runEval(os.Args[2:])
 	case "worker":
 		err = runWorker(os.Args[2:])
 	default:
@@ -53,6 +59,6 @@ func main() {
 }
 
 func usage() {
-	fmt.Fprintln(os.Stderr, "usage: gbrgames validate [-games DIR] | import [-games DIR] [-all] EXPORT.json | export [-repo R] [-commit SHA] [-out FILE] | boottest-payload [-out FILE] ID | inspect-image [-game ID] [-json] [-no-pull] [IMAGE] | first-boot [-game ID | -image IMAGE] [-env K=V] [-max D] [-quiet D] [-out DIR] | draft -name NAME -image IMAGE [-steam-app ID] [-first-boot REPORT] [-provider ollama|gemini] [-model M] | research -name NAME [-notes N] [-out FILE] | build -name NAME -variant JSON|@FILE [-out FILE] | worker [-once]")
+	fmt.Fprintln(os.Stderr, "usage: gbrgames validate [-games DIR] | import [-games DIR] [-all] EXPORT.json | export [-repo R] [-commit SHA] [-out FILE] | boottest-payload [-out FILE] ID | inspect-image [-game ID] [-json] [-no-pull] [IMAGE] | first-boot [-game ID | -image IMAGE] [-env K=V] [-max D] [-quiet D] [-out DIR] | draft -name NAME -image IMAGE [-steam-app ID] [-first-boot REPORT] [-provider ollama|gemini] [-model M] | research -name NAME [-notes N] [-out FILE] | build -name NAME -variant JSON|@FILE [-out FILE] | repair -id ID [-reason R] | eval [-ids all] [-out eval.md] | worker [-once]")
 	os.Exit(2)
 }