feat(aliases): use citext column for alias addresses

[taobojlen]

BREAKING CHANGE: admins must manually run the make_emails_case_insensitive command before deploying this.

run this command using:

docker compose exec web /home/elixir/app/bin/shroud rpc Shroud.Release.make_emails_case_insensitive

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (main@3592ab0). Click here to learn what that means. Patch has no changes to coverable lines.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #53 +/- ## ======================================= Coverage ? 67.11% ======================================= Files ? 97 Lines ? 1703 Branches ? 0 ======================================= Hits ? 1143 Misses ? 560 Partials ? 0 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Shroud-email). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Shroud-email)

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