Say a part waiting for the operator as needs-operator and pass its gate; add secret families (issue 386, hq ADR 0283)

A module waiting for the operator's secret failed its first-node gate, held
every later walk and was said as 'nothing for you to do'. The node-engine's
new waiting state is checked against the manifest and the secrets given,
read by the gate as a wait for a person, and raised as needs-operator naming
the act. A secret family gives each part its own one-line secret, which the
mesh never makes, so the desk prompt can take each password.

cmd/mesh-controller/plain_words.go

@@ -221,6 +221,16 @@ var plainWordings = map[string]func(conditions.Observation) words{
 		w := usedAsFoundObservation(orModule(module), machineOr(o, "a machine"), o.Summary, nil)
 		return words{Headline: w.Headline, Explanation: w.Explanation, Needs: w.Needs, Resolved: w.Resolved}
 	}),
+	kindNeedsOperator: worded(func(o conditions.Observation) words {
+		// The observation carries the act itself (ADR 0283); these are its words when only the kind is known.
+		module := ""
+		if o.Scope == conditions.ScopeModule && o.Machine != "" {
+			module = strings.TrimSuffix(o.ID, "."+o.Machine)
+		}
+		node := machineOr(o, "a machine")
+		w := needsOperatorWords(orModule(module), node, nil)
+		return w
+	}),
 	kindProviderFailing: worded(func(o conditions.Observation) words {
 		thing, consumer := conditions.ThingWords(o), idPart(o, 2)
 		if consumer == "" {