RevenueCat's entitlement identifier contains U+2024 (ONE DOT LEADER),
not a plain period — "Menul.io Pro" never matched the real
"Menul⁚io Pro" key, so isProActive() stayed false even after a real
purchase (confirmed via a genuine sandbox trial that RevenueCat
recorded as active while the app kept showing "Ücretsiz plan").
RevenueCat's API doesn't allow renaming an entitlement's lookup_key
after creation (405), so fixed on our side instead: this app only
ever grants one entitlement, so "any active entitlement" == Pro,
no identifier string needed.