fix(dev): clarify Android pending inspector and harden debug entry guard

- Report UNIMPLEMENTED from Android NotificationInspector instead of empty pending
- Surface iOS-only inspector message in NotificationDebugPanel without noisy errors
- Gate Account debug link with import.meta.env.DEV and document intent
- Add architecture comments on NotificationDebugService, inspector plugin, and native exports

ios/App/App/NotificationInspectorPlugin.swift

@@ -2,6 +2,10 @@ import Foundation
 import Capacitor
 import UserNotifications
 
+// DEV-only diagnostic plugin.
+// Kept separate from DailyNotificationPlugin intentionally
+// to avoid altering production notification scheduling behavior.
+
 @objc(NotificationInspector)
 public class NotificationInspectorPlugin: CAPPlugin, CAPBridgedPlugin {
     public var identifier: String { "NotificationInspector" }