chore(deps): bump ecto from 3.12.2 to 3.12.4

[dependabot[bot]]

Bumps ecto from 3.12.2 to 3.12.4.

Changelog

Sourced from ecto's changelog.

v3.12.4 (2024-10-07)

Enhancements

• [Ecto.Repo] Use persistent_term for faster repository lookup
• [Ecto.Repo] Document new :pool_count option

Bug fixes

• [Ecto.Repo] Make Ecto.Repo.reload respect source

v3.12.3 (2024-09-06)

Bug fixes

• [Ecto.Changeset] Allow associations to be cast/put inside of embedded schema changesets

Commits

• 4cc725a Release v3.12.4
• 52c0aa0 Document pool_count
• e75c32a Use persistent_term for faster adapter config lookups (#4521)
• 407912c Revert "Allow apply_changes/1 to use nested schemaless changesets for `:map...
• a180048 Allow apply_changes/1 to use nested schemaless changesets for :map type (...
• bafd821 Update CI (#4518)
• 49ee1fb Fix mssql 2017 integration tests (#4512)
• 57f00ad Refer to myxql instead of mariaex in docs (#4511)
• e3f038f Make Repo.reload respect source (#4510)
• b4ad5fc Clarify validations that use validate_change internally (#4509)
• Additional commits viewable in compare view

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