fix(ci): optomize ci with cache

[NeonGamerBot-QK]

This pr does:

• makes db checks run only when db files are modified
• makes scan_js use bun to be faster
• uses cache for rails

[Copilot]

Pull request overview

Updates the GitHub Actions CI workflow to improve caching/step consistency and streamline CI runs.

Changes:

• Adds global Bundler environment configuration (path/clean/without) to support more consistent Bundler caching.
• Simplifies several job steps (removes some step names, consolidates prettier checks, adds --prefer-offline for Yarn).
• Reworks db_checks steps and reduces scan_js to a no-op.

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[cskartikey]

Could you explain what changes were made and why they're necessary? Also, is this a standard or documented practice that I can review further?

[cskartikey]

why are we removing the names?