chore(deps): update rust crate thiserror to v2.0.19

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
thiserror	dependencies	patch	2.0.18 → 2.0.19

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Release Notes

dtolnay/thiserror (thiserror)

v2.0.19

Compare Source

• Update to syn 3

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[K-dash]

@renovate rebase

The lockfile conflicts with main after #155 and the other dependency PRs landed. Regenerating Cargo.lock from the current base is Renovate's job — resolving it by hand would fabricate a resolution the resolver never produced. CI on main is green again (see #155), so this should go green on the next run.