Delete the builder, the build asks, the build queue and the merge gate: the builder's keys are the only way a module is built (issues 1851, 1299, 1318; C2b-C5, C10)

The controller asks no build of anybody (ADR 0501 §5, ADR 0525 clause 6, ADR 0503 §3). Every module of a walk is taken from the
builder's done key; a key not done yet waits, named in the plan, and never fails it.

- C2b/C2c: internal/builder and cmd/mesh-controller's asks go (askABuild, onlyTheBuildersOwn, buildOneAsked, takeIn from an
  outcome, buildAgentsOwn, the builder's say and its fallback, the daemon hearing an outcome). The server follows the retired
  seats' built subjects only to let go of them, because the installer's carried user list names them.
- C2d: replay, queue, cancel, clear, kill, pause, resume, delivery-check, check-here and merge-gate are refused by name.
- C3: the check queues (CHECKS_READY, CHECKS_OTHER) and their workers, the checks-running and plans-building buckets and
  their grants, the build queue and its hold (plans_building.go, queue.go, link/holds.go, builds_nats.go, checks_nats.go).
- C4: merge_gate*.go, the pull request's repo-check path, the Checked event and its layers; a pull request asks the
  controller nothing but to tell mesh-config what its head declares.
- C5: the builds bucket is written only by key_takein.
- C10 (help and refusals): the terminal's help lists only what is served.

Integration tests of the plan's tiers, sends, stops and retries now run on a stand-in builder with a done key for every
module (walk_keys_scaffold_integration_test.go); the tests of the asks, the queue, the merge gate and the replays are deleted.

cmd/mesh-controller/addresses_test.go

@@ -1,12 +1,9 @@
 package main
 
 import (
-	"encoding/json"
 	"strings"
-	"testing"
 
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // An address is read from the node's settings where it is used, never recorded with a port
@@ -14,62 +11,6 @@ import (
 
 var aDigest = "sha256:" + strings.Repeat("e", 64)
 
-// **A build is recorded by digest and path**, whatever address the builder pushed to — what it
-// made and what it stood on both; an image the module runs from elsewhere is left where it says.
-func TestABuildIsRecordedWithoutTheStoresAddress(t *testing.T) {
-	manifest, _ := json.Marshal(map[string]any{
-		"module": "gitea", "version": "1",
-		"resources": []map[string]any{
-			{"id": "server", "type": "container", "name": "mesh-gitea",
-				"image": "anchor.internal:5100/gitea/server@" + aDigest},
-			{"id": "config", "type": "archive", "path": "/etc/gitea", "digest": aDigest,
-				"source": "http://anchor.internal:5100/v2/gitea/config/blobs/" + aDigest},
-			{"id": "cache", "type": "container", "name": "mesh-gitea-cache",
-				"image": "valkey/valkey@" + aDigest},
-		},
-	})
-	kept := buildFrom(link.BuildResult{
-		ID: "b1", Repository: "https://forge.example/gitea.git", Commit: "abc", On: "laptop",
-		Manifest: manifest,
-		Made: []link.MadeArtifact{
-			{Name: "server", Kind: "image", Reference: "anchor.internal:5100/gitea/server@" + aDigest},
-			{Name: "config", Kind: "archive", Reference: "http://anchor.internal:5100/v2/gitea/config/blobs/" + aDigest},
-		},
-		Against: []string{"anchor.internal:5100/mesh-tools/runtime@" + aDigest},
-	})
-	if kept.Module != "gitea" {
-		t.Fatalf("the module was not read from the recorded manifest: %q", kept.Module)
-	}
-	if kept.Made[0].Reference != catalogue.ArtifactStoreScheme+"gitea/server@"+aDigest {
-		t.Errorf("the image is recorded as %q, address and all", kept.Made[0].Reference)
-	}
-	if kept.Made[1].Reference != catalogue.ArtifactStoreScheme+"gitea/config/blobs/"+aDigest {
-		t.Errorf("the archive is recorded as %q, address and all", kept.Made[1].Reference)
-	}
-	recorded, err := catalogue.ParseManifest(kept.Manifest)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got := recorded.Resources[0]["image"]; got != catalogue.ArtifactStoreScheme+"gitea/server@"+aDigest {
-		t.Errorf("the recorded manifest's image is %v", got)
-	}
-	if got := recorded.Resources[1]["source"]; got != catalogue.ArtifactStoreScheme+"gitea/config/blobs/"+aDigest {
-		t.Errorf("the recorded manifest's archive is %v", got)
-	}
-	if got := recorded.Resources[2]["image"]; got != "valkey/valkey@"+aDigest {
-		t.Errorf("an image the build did not make was rewritten: %v", got)
-	}
-	if strings.Contains(string(kept.Manifest), "anchor.internal:5100") {
-		t.Errorf("the recorded manifest still carries the store's address:\n%s", kept.Manifest)
-	}
-	// What the build stood on is an edge to another module's artifact, and it is recorded the way
-	// that artifact is: by path in the store, so the edge still names the same thing when the
-	// store answers at another address.
-	if kept.Against[0] != catalogue.ArtifactStoreScheme+"mesh-tools/runtime@"+aDigest {
-		t.Errorf("what the build stood on was recorded by address: %v", kept.Against)
-	}
-}
-
 // aStore is a module offering the artifact store on 5000, published the long way as the
 // distribution module does, so a node may be given another number for it.
 func aStore() catalogue.Manifest {