Add min sequence number and creation date

[sydneynotthecity]

PR Checklist

PR Structure

• This PR has reasonably narrow scope (if not, break it down into smaller PRs).
• This PR avoids mixing refactoring changes with feature changes (split into two PRs
  otherwise).
• This PR's title starts with the jira ticket associated with the PR.

Thoroughness

• This PR adds tests for the most critical parts of the new functionality or fixes.
• I've updated the docs and README with the added features, breaking changes, new instructions on how to use the repository.

Release planning

• I've decided if this PR requires a new major/minor/patch version accordingly to
  semver, and I've changed the name of the BRANCH to release/* , feature/* or patch/* .

What

This PR removes self-referential logic between accounts and accounts_current in a downstream dbt model. by adding min sequence number and account creation date to the original staging table, we remove anti-patterns in downstream dbt models.

Why

To get all CI checks to pass (project evaluator and elementary) we needed to remove the account_date CTE in this MGI model

Known limitations

[TODO or N/A]

[sydneynotthecity]

Identical PR: #39. Closed because the CI was failing due to transient errors

[chowbao]

nit: accounts is pretty small so this probably doesn't matter much but I'm pretty sure we could create an int_* for account create time instead of running this CTE. It's probably also possible to only look up relevant account_ids in incremental runs instead of all account_ids

[sydneynotthecity]

Yeah, I agree. I created a ticket to research/refactor: https://stellarorg.atlassian.net/browse/HUBBLE-498