changes for email signup

deploy/migrations/0087_widen_phone_for_email_signup.down.sql

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+ALTER TABLE public.users ALTER COLUMN phone TYPE character varying(32);

deploy/migrations/0087_widen_phone_for_email_signup.up.sql

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+-- Email-as-identity signup mode encodes an email address as a reversible
+-- big-integer-decimal string behind an "888" prefix and stores it in
+-- users.phone via the existing phone-number column/flow. A real phone number
+-- never approaches this length, but an encoded email can (roughly 2.4 decimal
+-- digits per source byte), so the original 32-char cap (sized only for real
+-- phone numbers) is too narrow. 200 chars comfortably covers realistic email
+-- addresses; see internal/domain.ValidPhone and internal/domain.EncodeEmailPhone.
+ALTER TABLE public.users ALTER COLUMN phone TYPE character varying(200);