feat: skip serializing empty vectors in various structs

[nyurik]

No description provided.

[Copilot]

Pull Request Overview

This PR implements serialization optimization by skipping empty vector fields in YAML output. The change adds #[serde(skip_serializing_if = "Vec::is_empty")] attributes to vector fields across various structs in the DBC data model, reducing output verbosity when these collections contain no elements.

Key Changes:

• Modified struct definitions to conditionally skip empty vectors during serialization
• Updated snapshot tests to reflect the cleaner YAML output without empty vector fields

Reviewed Changes

Copilot reviewed 63 out of 63 changed files in this pull request and generated no comments.

File	Description
src/lib.rs	Added serde skip attributes to 20+ vector fields across Signal, MessageTransmitter, ValueTable, Message, EnvironmentVariable, ValueDescription, SignalGroups, and Dbc structs
tests/snapshots-dbc-cantools/*.snap	Updated 50+ test snapshots to remove empty vector serialization lines, verifying the feature works correctly

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[amaraxmonika]

Handy