feat: E.164 phone validation and storage with libphonenumber

- Add giggsey/libphonenumber-for-php, PhoneNumberNormalizer, ValidPhoneNumber rule

- Store subscribers as E.164; mutator normalizes on save; optional phone required from form block

- Migration to normalize legacy subscriber phones; Mailwizz/search/UI/tests updated

- Add run-deploy-from-local.sh and PREREGISTER_DEFAULT_PHONE_REGION in .env.example

Made-with: Cursor

.env.example

@@ -7,6 +7,9 @@ APP_URL=http://localhost
 # Optional: max requests/minute per IP for public /r/{slug} and subscribe (default: 1000 when APP_ENV is local|testing, else 60).
 # PUBLIC_REQUESTS_PER_MINUTE=120
 
+# Default region for parsing national phone numbers (ISO 3166-1 alpha-2). Used by libphonenumber.
+# PREREGISTER_DEFAULT_PHONE_REGION=NL
+
 # Wall-clock times from the admin UI (datetime-local) are interpreted in this zone.
 APP_TIMEZONE=Europe/Amsterdam