Add golangci-lint static analysis and integrate into CI

[bamnet-bot]

This Pull Request integrates golangci-lint static analysis into the repository:

1. Linter Configuration: Added .golangci.yaml to enable static checks, styling conventions (revive), formatting, security audits (gosec), and code optimization warnings (gocritic).
2. CI Integration: Modified .github/workflows/test.yaml to run golangci-lint automatically via GitHub Actions on every push/PR.
3. Linter Fix: Rewrote a single-case switch statement in vehicle_data_test.go to satisfy the gocritic readability rule.

All tests and linter checks run and pass cleanly locally.

[gemini-code-assist]

Code Review

This pull request introduces a .golangci.yaml configuration file to enable several Go linters and simplifies a single-case switch statement to an if statement in vehicle_data_test.go. Feedback on the linter configuration notes that the custom revive rules block overrides the default ruleset entirely, disabling other default checks, and suggests removing the linters-settings block if the default ruleset is desired.

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[gemini-code-assist]

In revive, providing a custom rules list in the configuration completely overrides the default ruleset rather than extending it. By only listing the exported rule here, all other default stylistic and convention checks of revive (such as var-naming, error-strings, indent-error-flow, etc.) are disabled.

If your intention is to use the default revive ruleset (which already includes the exported rule as a warning), you can safely remove this entire linters-settings block.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.24%. Comparing base (6abf558) to head (91c8a44).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #10   +/-   ##
=======================================
  Coverage   84.24%   84.24%           
=======================================
  Files           5        5           
  Lines         273      273           
=======================================
  Hits          230      230           
  Misses         26       26           
  Partials       17       17           

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