chore(cargo): Update stale lock file

[markushi]

Running cargo build locally revealed a diff within Cargo.lock, as cargo build seems to silently patch the package version, ensuring it matches Cargo.toml.

This PR:

• Manually updates Cargo.lock package version to "5.10.3", so it matches Cargo.toml.
• Updates the bump version script to run cargo metadata, so it does the lock file package version bump automatically in future. This mirrors what vroomrs does, and works when run by craft (cargo update --offline would have failed on a cold cargo cache).

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