Heal what is known, under a brake, and say every repair (hq to-be 45 Phase 3)

Research 031 counted the repairs people made by hand: a push to unstick a
plan waiting on a report, a controller restarted to make an object again, a
plan closed, a consumer re-made from now. Each was the ordinary path taken
again by someone who noticed. The healer registry makes each a registered
response to one condition kind, with a budget, a settle and its event:

- H1 sent-not-reported: ask the machine's node-engine to report again
  (mesh.node.<n>.ask.report); if it does not report what it was sent, send
  it again, never moving a build a policy or a plan holds back
- H2 stalled: close a plan whose wait is superseded or finished
- H3 holder-silent / consumer-lost: the send's own assertion of the bus's
  objects (issue 208's note)
- H4 consumer-behind: consumer-reset, only for a consumer the stream table
  marks resettable (the controller's own events consumer)
- H5 is the identity provider's own repair (ADR 0224 §5), registered only

Success is the observation clearing the condition, never the healer; a spent
budget hands the condition to the operator, urgent, with what was tried, and
no healer touches it again. Every act is begun in the store before it is made
(migration 0070), kept in the condition's tried as "healer Hn" and said as
the seat event healer-acted; a heal is never a hand act. More than twelve acts
in an hour stop every healer until an hour after the last, said urgently.
Only the lease holder heals.

S15 is live: a cause repaired by hand twice in a fortnight raises
healer-wanted, naming the healer that was not enough where one exists. D6's
far-behind finding has its own kind, consumer-behind. Nodes are granted the
question; the controller's grant gains healer-acted (genesis lock in
mesh-host). `healers` lists the registry, the acts and the brake; status
counts the week's heals.

cmd/mesh-controller/status.go

@@ -326,6 +326,15 @@ func printStatus(asked answers) error {
 		fmt.Printf("%d act(s) done by hand in the last seven days — `hand-acts` lists them, and why\n\n", *asked.handActs)
 	}
 
+	// And what the mesh repaired by itself (novox/hq to-be 45 §7): seen, not only done.
+	switch {
+	case asked.healsUnread != "":
+		fmt.Printf("what the healers did could not be read: %s\n\n", asked.healsUnread)
+	case asked.heals != nil && (asked.heals.Acts > 0 || asked.heals.Escalated > 0):
+		fmt.Printf("%d repair(s) made by the healers in the last seven days, %d handed to the operator — `healers` "+
+			"lists them, and each is in its condition's tried\n\n", asked.heals.Acts, asked.heals.Escalated)
+	}
+
 	if adopted := adoptedNodes(nodes); len(adopted) > 0 {
 		// Said, because nothing forces the flip: a node left adopted is visible here rather than
 		// read as converged (novox/hq ADR 0100). Not a fault, so it does not break "all well".
@@ -474,6 +483,13 @@ func theThreeQuestions(ctx context.Context, open *stores) (answers, error) {
 		}
 	}
 
+	// And what the healers did this week (novox/hq to-be 45 §7).
+	if heals, err := inv.HealsSince(ctx, time.Now().Add(-7*24*time.Hour)); err != nil {
+		out.healsUnread = err.Error()
+	} else {
+		out.heals = countHeals(heals)
+	}
+
 	// And which machines are not running what the mesh would send them. The same question as a
 	// module being behind its source, one level down: that one says the catalogue is out of date,
 	// this one says a machine is — and only the second has anybody's change waiting in it.