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/predefined.go

@@ -2,13 +2,9 @@ package main
 
 import (
 	"context"
-	"fmt"
-	"path"
-	"strings"
 
 	"git.novox.be/novox/mesh-sdk/go/catalogue"
 	"github.com/novox/mesh-controller/internal/inventory"
-	"github.com/novox/mesh-controller/internal/link"
 )
 
 // The list of predefined keys the mesh publishes (novox/hq ADR 0348 §7, design 57 package K2, issue 661).
@@ -20,48 +16,6 @@ import (
 // against the list kept (catalogue.UsePredefined). mesh-config publishes it on the bus from there (design 57
 // package K3); the controller keeps no config value, only the keys.
 
-// fromTheCatalogue is whether a build is of the catalogue's repository, whose list alone the mesh publishes: by
-// its name, in the URL form or the seat form.
-func fromTheCatalogue(result link.BuildResult) bool {
-	for _, repository := range []string{result.Repository, sourceRepository(result)} {
-		name := strings.TrimSuffix(path.Base(strings.TrimRight(repository, "/")), ".git")
-		if name == catalogue.CatalogueRepository {
-			return true
-		}
-	}
-	return false
-}
-
-func sourceRepository(result link.BuildResult) string {
-	if result.Source == nil {
-		return ""
-	}
-	return result.Source.Repository
-}
-
-// carriedList is the list a build of the catalogue carried, read strictly; nil for a build of another
-// repository, or one that carried none.
-func carriedList(result link.BuildResult) (catalogue.PredefinedList, error) {
-	if result.Predefined == nil || !fromTheCatalogue(result) {
-		return nil, nil
-	}
-	list, err := catalogue.ParsePredefined(result.Predefined.Keys)
-	if err != nil {
-		return nil, fmt.Errorf("%s carried a list of predefined keys that is refused: %w", result.ID, err)
-	}
-	return list, nil
-}
-
-// judgedWith is the list a build's manifest is first judged against at registration: the catalogue's own at the
-// commit built, which its build judged it against, where it carried one; the list kept otherwise.
-func judgedWith(result link.BuildResult) (catalogue.PredefinedList, error) {
-	list, err := carriedList(result)
-	if err != nil || list != nil {
-		return list, err
-	}
-	return catalogue.PublishedPredefined(), nil
-}
-
 // loadPredefined makes the list kept in the store the one this controller judges manifests against. A store
 // keeping none leaves the list it has.
 func loadPredefined(ctx context.Context, inv *inventory.Inventory) error {
@@ -72,22 +26,3 @@ func loadPredefined(ctx context.Context, inv *inventory.Inventory) error {
 	catalogue.UsePredefined(kept.Keys)
 	return nil
 }
-
-// publishPredefined keeps a trunk build's list when it is newer than the one kept, says so, and loads what the
-// store keeps then — this build's, or a newer one another controller process kept.
-func publishPredefined(ctx context.Context, inv *inventory.Inventory, result link.BuildResult,
-	list catalogue.PredefinedList) error {
-	kept, err := inv.KeepPredefined(ctx, inventory.PredefinedRecord{Keys: list, Repository: result.Repository,
-		Commit: result.Commit, Generation: result.Predefined.Generation, Build: result.ID})
-	if err != nil {
-		return err
-	}
-	if kept {
-		fmt.Printf("%s: the list of predefined keys at %s (generation %d) is published: %s\n", result.ID,
-			short(result.Commit), result.Predefined.Generation, strings.Join(list.Keys(), ", "))
-	} else {
-		fmt.Printf("%s: the list of predefined keys at %s (generation %d) is not newer than the one kept, which "+
-			"stands\n", result.ID, short(result.Commit), result.Predefined.Generation)
-	}
-	return loadPredefined(ctx, inv)
-}