462

[RAprogramm]

Closes #462

Release 0.29.0:

• masterror 0.28.0 → 0.29.0 — DisplayMode wired into Display (behavioral change in error output), real downcast/downcast_mut, app_error! expression macro, boxed error round-trip, clippy format-args lint transparency, source attachment in #[app_error] conversions with provider forwarding
• masterror-derive 0.11.3 → 0.12.0 — source-attaching From codegen + no_source flag + Send/Sync bounds (breaking for non-Send domain types), enum-level #[error(fmt = ...)], raw-ident r#source template fix, deprecated-type hygiene
• masterror-template unchanged

READMEs regenerated with the new version. Merging to main triggers the release pipeline.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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