chore(release): prepare for publishing

[devolutionsbot]

🤖 New release

• pinget-core: 0.8.2 -> 0.9.0 (⚠ API breaking changes)

⚠ pinget-core 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/v0.47.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field SourceRecord.etag in /tmp/.tmpU60cLI/pinget/rust/crates/pinget-core/src/lib.rs:108
  field SourceRecord.last_modified in /tmp/.tmpU60cLI/pinget/rust/crates/pinget-core/src/lib.rs:110

Changelog

0.9.0 - 2026-06-03

Other

• Avoid unchanged preindexed source downloads

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