test: add profile validation e2e tests and fix pre-existing failures

Add 7 new e2e tests verifying profile form validation in both manage
and admin UIs: invalid phone number, phone normalization, E.164 hint
attributes, and admin-side email/phone/picture URL validation errors.

Fix 3 pre-existing test failures:
- Replace invalid seeded phone number (+1234567890) with valid E.164
  (+12025551234) that was causing profile update tests to fail
- Update email validation error assertion to match actual pydantic
  message (value_error type uses raw message, not label-prefixed)

tests/e2e/setup_db.py

@@ -87,7 +87,7 @@ async def seed() -> None:
         family_name="Smith",
         preferred_username="asmith",
         email="alice@example.com",
-        phone_number="+1234567890",
+        phone_number="+12025551234",
         picture="https://example.com/alice.jpg",
         locale="en",
         groups=["users"],