Land feature 57's controller work on its release branch

The controller plans config, templates and moved providers' provisions,
hands bus accounts to the vault and judges the new manifest words, on the
feature's SDK and node-engine validator (feature 57, config and provisioning).

internal/conditions/plain_test.go

@@ -258,9 +258,11 @@ func TestBorrowedWordsAreLogged(t *testing.T) {
 	loggedUnworded.Clear()
 	t.Cleanup(loggedUnworded.Clear)
 	var out bytes.Buffer
-	writer := log.Writer()
+	writer, flags := log.Writer(), log.Flags()
 	log.SetOutput(&out)
-	t.Cleanup(func() { log.SetOutput(writer) })
+	// Without the logger's own date and time, which would hold "23:3" itself from 23:30 to 23:39 (issue 752).
+	log.SetFlags(0)
+	t.Cleanup(func() { log.SetOutput(writer); log.SetFlags(flags) })
 	// A time that changes each observation, and a hash-shaped word: one line, quoting neither.
 	for _, at := range []string{"23:32", "23:33", "23:34"} {
 		if _, err := k.Observe(t.Context(), Observation{Scope: ScopeMachine, ID: "ace", Kind: "test-clock", Machine: "ace",