R-772: a health probe that could not run records not_checked + NOT healthy, is looked at again on the 10 s cycle, and the app page says so

The state stays the containers' (probeSaysUnhealthy skips a not-checked record), so R-630 holds.
Red-proof RP-D1 — felhom.eu audits/visitors-2026-10-01/D.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/stacks/manager.go

@@ -114,10 +114,21 @@ type ContainerInfo struct {
 }
 
 // HealthProbeResult holds the latest controller-side health probe result.
+// probeSaysUnhealthy: a probe that RAN and failed overrides a running state to unhealthy; a not-checked record (R-772)
+// does not — the containers decide. Pinned by TestProbeSaysUnhealthy_NotCheckedLeavesTheStateAlone.
+func probeSaysUnhealthy(hp *HealthProbeResult) bool {
+	return hp != nil && !hp.Healthy && !hp.NotChecked
+}
+
 type HealthProbeResult struct {
 	Healthy   bool                `json:"healthy"`
 	LastCheck time.Time           `json:"last_check"`
 	Details   []HealthCheckDetail `json:"details"`
+	// NotChecked: the declared check could not run — no container to probe (R-772). Healthy is then FALSE: a record of a
+	// check that did not happen never says healthy (presence is not success). The stack's STATE is still read from its
+	// containers (manager.go's override skips a not-checked record), so a running app is never painted unhealthy
+	// because the box could not look. Pinned by TestRunHealthProbes_NoContainerIsNotHealthy.
+	NotChecked bool `json:"not_checked,omitempty"`
 }
 
 // HealthCheckDetail holds the result of a single health check item.
@@ -812,7 +823,7 @@ func (m *Manager) refreshStatusLocked() error {
 
 		// Re-apply controller-side health probe results: if the last probe
 		// failed and Docker thinks the container is running, override to unhealthy.
-		if stack.State == StateRunning && stack.HealthProbe != nil && !stack.HealthProbe.Healthy {
+		if stack.State == StateRunning && probeSaysUnhealthy(stack.HealthProbe) {
 			stack.State = StateUnhealthy
 		}