212

[RAprogramm]

Closes #212.

Adds a ci flag to #[column(...)] for case-insensitively unique text columns (usernames, emails, handles):

• find_by_{field} / exists_by_{field} compare via LOWER(col) = LOWER($1)
• Option<T> fields unwrap to T in the lookup signature — a NULL column never matches a probe
• With migrations, unique + ci emits a functional CREATE UNIQUE INDEX {table}_{column}_lower_key ON {table} (LOWER({column})) instead of an inline UNIQUE constraint
• With typed_constraints, violations of that index resolve to the field like any other unique constraint

Wiki (Attributes-en) documents the flag.

[codecov]

Codecov Report

❌ Patch coverage is 93.75000% with 4 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...rates/entity-derive-impl/src/entity/parse/field.rs	80.00%	2 Missing ⚠️
crates/entity-derive-impl/src/entity/repository.rs	66.66%	1 Missing ⚠️
...derive-impl/src/entity/sql/postgres/constraints.rs	66.66%	1 Missing ⚠️

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