Walk phases: a report past the silent bound never moves a walk's end; keep phases outside the hold on the plans; first-node gate in words (review of #206)

internal/inventory/plans.go

@@ -243,7 +243,7 @@ type PlanModule struct {
 	// went there in one send (novox/hq issue 281), and one gate judges what one send moved. Empty for
 	// the module the gate is kept on, and for a plan from before tiers were sent whole.
 	GatedBy string `json:"gated_by,omitempty"`
-	// Rest is, per machine of the rest, the declaration the send after the gate carried there (novox/hq ADR
+	// Rest is, per machine of the rest, the declaration the send after the first-node gate carried there (novox/hq ADR
 	// 0282 decision 6): the machine's first report of it, applied, is when the build runs there.
 	Rest map[string]SentDeclaration `json:"rest,omitempty"`
 }
@@ -315,7 +315,7 @@ type GateReading struct {
 	Said string `json:"said,omitempty"`
 }
 
-// maxReadings bounds a gate's readings: a judging that never passes reads every few seconds for ten minutes.
+// maxReadings bounds a first-node gate's readings: a judging that never passes reads every few seconds for ten minutes.
 const maxReadings = 24
 
 // Read keeps one reading: a pass always, and a reading that did not pass only when the one before passed or
@@ -324,8 +324,8 @@ func (g *PlanGate) Read(at time.Time, healthy bool, said string) {
 	if !healthy && len(g.Readings) > 0 && !g.Readings[len(g.Readings)-1].Healthy {
 		return
 	}
-	if len(said) > 200 {
-		said = said[:200]
+	if r := []rune(said); len(r) > 200 {
+		said = string(r[:200])
 	}
 	g.Readings = append(g.Readings, GateReading{At: at, Healthy: healthy, Said: said})
 	if len(g.Readings) > maxReadings {