chore(release): harden mobile build workflow

Promote the reproduced release lessons into harness enforcement: keep tracked native regeneration separate from artifact builds, separate Android build and upload authorization, use stable login readiness in Maestro, and retain the iOS 43 and Android 46 version increments.

e2e/maestro/login-screen-smoke.yaml

@@ -12,7 +12,7 @@ name: Standalone-backend build reaches the Auth login screen
 - tapOn:
     point: "94%,44%"
 - extendedWaitUntil:
-    visible: "Explore intimacy together"
+    visible: "Password"
     timeout: 30000
 - assertVisible: "Sauci"
 - assertVisible: "Password"