Hold the plans schema's longest bound to the value, and say what a slow store gives (review 75)

cmd/mesh-controller/plans_follow.go

@@ -26,6 +26,8 @@ import (
 var maxPlanWait = link.LongestAnswer - planWaitStart
 
 // planWaitStart is what the verb's window allows beyond the bound: starting the command and opening the stores.
+// A store slow enough to push the read and the answer past it degrades as any long call does: the caller is
+// answered that the call is still running, and `calls` with its id says what came of it.
 const planWaitStart = 5 * time.Second
 
 // planWaitEvery is how often a wait reads the plan again.

cmd/mesh-controller/plans_follow_test.go

@@ -179,3 +179,18 @@ func TestAPlanFollowedFromTheStoreAnswersWhenItMoves(t *testing.T) {
 		t.Fatalf("a plan that did not move answered %+v (%v)", got, err)
 	}
 }
+
+// The verb's schema says the longest bound in words, and the words are the value (review 75 on #266): the
+// catalogue cannot read maxPlanWait, so this holds them together.
+func TestThePlansSchemaSaysTheLongestBoundThereIs(t *testing.T) {
+	v, ok := controllerVerb("plans")
+	if !ok {
+		t.Fatal("no plans verb")
+	}
+	props, _ := v.Input["properties"].(map[string]any)
+	bound, _ := props["bound"].(map[string]any)
+	said, _ := bound["description"].(string)
+	if !strings.Contains(said, maxPlanWait.String()+", the default, is the longest") {
+		t.Fatalf("the schema says %q; the longest bound is %s", said, maxPlanWait)
+	}
+}