Fix custom type spec#21

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fishtreesugar wants to merge 15 commits intobitwalker:mainfrom

fishtreesugar:fix-custom-type-spec

Commits on Mar 4, 2024

fix: return error when embeds_many field input with wrong type
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Commits on Apr 17, 2024

Commits on Aug 15, 2024

fix: workaround breakage of ecto 3.12
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Commits on Dec 10, 2024

fix: matching on `Regex` struct instead
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Commits on Dec 11, 2024

Commits on Apr 4, 2025

Commits on Nov 3, 2025

Commits on Apr 13, 2026