Remove Addresses.wallet_sso_source

[timolegros]

Link to Issue

Closes: #9106

Description of Changes

• Removes the Addresses.wallet_sso_source column in the DB since it is unused and the data inside it is corrupted (contains 3 'falsy' values: empty strings, NULL, and 'unknown'). The empty string caused Zod schema issues which led to Can't create threads from specific addresses #9106.
  • This column was added in Turn on session keys, use SIWE for Ethereum, add server verification, add Canvas node #3426 so I confirmed with Raymond that we should remove it.

Test Plan

• Use a variety of sign-in methods both with native wallets and with Magic
  • You can use pnpm delete-user [user_id OR email] to delete users for testing creating a new account vs sign-in

Deployment Plan

Other Considerations

[ilijabojanovic]

LGTM