chore: release v0.4.0

[release-plz-bot-mag1cfrog]

🤖 New release

• arrow-sql-server: 0.3.2 -> 0.4.0 (⚠ API breaking changes)

⚠ arrow-sql-server breaking changes

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field DirectWriteProfile.varchar_bytes in /tmp/.tmp5JoVZZ/arrow-sql-server/src/write/profile.rs:38

--- failure enum_variant_added: enum variant added on exhaustive enum ---

Description:
A publicly-visible enum without #[non_exhaustive] has a new variant.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#enum-variant-new
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/enum_variant_added.ron

Failed in:
  variant StringPolicy:AsciiVarChar in /tmp/.tmp5JoVZZ/arrow-sql-server/src/write/policy.rs:37
  variant StringPolicy:AsciiVarChar in /tmp/.tmp5JoVZZ/arrow-sql-server/src/write/policy.rs:37
  variant StringPolicy:AsciiVarChar in /tmp/.tmp5JoVZZ/arrow-sql-server/src/write/policy.rs:37

Changelog

0.4.0 - 2026-08-05

Added

• add opt-in ASCII varchar string policy (#201)

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