feat(deploy-panel): tell Community operators deploys lack auto-rollback (#1193)

* feat(deploy-panel): tell Community operators deploys lack auto-rollback

Atomic-deploy is paid-only (effectiveTier === 'paid' in the deploy and
update routes); Community deploys proceed without the backup/restore
fallback. The UI never told the user. They only learned the difference
when a deploy failed and there was nothing to roll back to.

Add a one-line muted-style notice strip inside the deploy-feedback
modal, between header and log body, shown only when the user is on
Community AND the action is a deploy or update (the two paths that
support atomic on paid).

Copy is deliberately one line and states the requirement once:

  "Auto-rollback on failure is a Skipper feature."

Compliant with Directive 31: it does not enumerate where the feature
is hidden, it does not say "you don't get it", it states what the
upgrade unlocks. Other tier-named upgrade prompts in Sencho follow
the same pattern.

Resolves M-3 from the stack-management audit.

* fix(deploy-panel): mount DeployFeedbackPortal inside LicenseProvider

The portal was mounted at App level, outside the authed AppContent
tree where LicenseProvider lives. After this PR introduced
useLicense() inside DeployFeedbackModal (for the atomic-deploy
notice), every test that opened the modal hit:

  Error: useLicense must be used within a LicenseProvider

caught by ErrorBoundary and surfaced through every deploy-log-panel
E2E spec.

Move the portal inside LicenseProvider in AppContent. DeployFeedback-
Provider stays at App level so its state survives across re-renders
of AppContent; the portal still inherits it because AppContent is a
descendant.

A deploy can only fire after authentication, so rendering the portal
only inside the authed tree loses nothing in practice.

frontend/src/App.tsx

@@ -36,6 +36,10 @@ function AppContent() {
     <NodeProvider>
       <LicenseProvider>
         <EditorLayout />
+        {/* Portal lives inside LicenseProvider so DeployFeedbackModal can
+            call useLicense() (M-3 atomic-deploy notice depends on isPaid).
+            Outer DeployFeedbackProvider is still an ancestor through App. */}
+        <DeployFeedbackPortal />
       </LicenseProvider>
     </NodeProvider>
   );
@@ -46,7 +50,6 @@ function App() {
     <AuthProvider>
       <DeployFeedbackProvider>
         <AppContent />
-        <DeployFeedbackPortal />
       </DeployFeedbackProvider>
       <ToastContainer />
     </AuthProvider>