Remove the controller's seat, the lease verbs and placement's adopt and hand-back; refuse any manifest naming the controller

The controller ended by its unassignment (ADR 0590), so its seat, the grants seat's lease write and
hand-back and placement's take-over from it serve nothing. The dependence check becomes strict
(clause 5): a read of the lease, a claim, a require or the module itself is refused like any other
declaration. held and artifacts-gone are the artifact sweep seat's (ADR 0571 §2). Issue 1126 B1, B2.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

go/buscompose/buscompose_test.go

@@ -1102,10 +1102,7 @@ func healthChecks(t *testing.T) {
 			// It hears its watchdogs' words on core subjects (Limits 3, 11).
 			for _, subject := range []string{"mesh.mod.power.event.sleeping", "mesh.control.g14.tools-alive",
 				"mesh.seat.mesh-self-check.event.checked", "mesh.mod.keycloak.event.provisioner.failing",
-				"mesh.mod.nats.event.bus.slow-consumer", "prov.applied.g14.keycloak",
-				// ADR 0582 clauses 4, 6 (issue 774, 774/S22): the lease write's events, and ASSIGNMENTS deleted.
-				"mesh.seat.mesh-grants.event.lease-altered", "mesh.seat.mesh-grants.event.removal-failed",
-				"mesh.seat.mesh-grants.event.lease-handed", "$JS.EVENT.ADVISORY.STREAM.DELETED.ASSIGNMENTS"} {
+				"mesh.mod.nats.event.bus.slow-consumer", "prov.applied.g14.keycloak"} {
 				if !MaySubscribe(perms, subject) {
 					t.Errorf("the watchman may not hear %s", subject)
 				}