chore(mxl-base): release v0.4.0

[marcbull]

🤖 New release

• mxl-base: 0.3.4 -> 0.4.0 (⚠ API breaking changes)

⚠ mxl-base breaking changes

--- failure auto_trait_impl_removed: auto trait no longer implemented ---

Description:
A public type has stopped implementing one or more auto traits. This can break downstream code that depends on the traits being implemented.
        ref: https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.45.0/src/lints/auto_trait_impl_removed.ron

Failed in:
  type Builder is no longer Sync, in /tmp/.tmp385lZA/mxl-crates/mxl-base/src/logging.rs:43
  type Builder is no longer UnwindSafe, in /tmp/.tmp385lZA/mxl-crates/mxl-base/src/logging.rs:43
  type Builder is no longer RefUnwindSafe, in /tmp/.tmp385lZA/mxl-crates/mxl-base/src/logging.rs:43

--- failure function_missing: pub fn removed or renamed ---

Description:
A publicly-visible function cannot be imported by its prior path. A `pub use` may have been removed, or the function itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.45.0/src/lints/function_missing.ron

Failed in:
  function mxl_base::logging::get_log_level, previously in file /tmp/.tmpkCUHS5/mxl-base/src/logging.rs:26
  function mxl_base::logging::set_log_level, previously in file /tmp/.tmpkCUHS5/mxl-base/src/logging.rs:22

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.45.0/src/lints/inherent_method_missing.ron

Failed in:
  Builder::without_stderr, previously in file /tmp/.tmpkCUHS5/mxl-base/src/logging.rs:57

Changelog

0.4.0 - 2025-12-15

Other

• improved logging

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This PR was generated with release-plz.