Fix Homebrew tap auto-update workflow

[turlockmike]

Summary

• Move secret existence check from job-level if to step-level check
• Job-level if: ${{ secrets.HOMEBREW_TAP_TOKEN != '' }} breaks workflow parsing entirely, preventing the release workflow from running on tag pushes

Test plan

• Merge, delete v0.3.2 tag, re-tag and push to verify full pipeline

Generated with Claude Code

[Copilot]

Pull request overview

This PR fixes a critical workflow parsing issue that prevented the release workflow from running when tags are pushed. The issue stemmed from using a job-level if condition that checks for secret existence, which breaks GitHub Actions workflow parsing.

Changes:

• Removed job-level if condition on update-homebrew job that was checking for HOMEBREW_TAP_TOKEN secret
• Added a dedicated "Check for tap token" step that sets a skip output variable when the token is missing
• Added conditional if: steps.check_token.outputs.skip != 'true' guards to all subsequent steps in the job

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[Copilot]

The skip logic has an issue: when the TOKEN is set (not empty), the skip output variable is never set, so it will be empty/undefined. This means subsequent steps checking steps.check_token.outputs.skip != 'true' will pass when the token exists (correct), but for the wrong reason (the output is undefined, not 'false').

To make the logic clearer and more robust, you should explicitly set the skip value for both cases. Add an else clause to set skip=false when the token exists.

Suggested change

	echo "skip=true" >> $GITHUB_OUTPUT
	echo "skip=true" >> $GITHUB_OUTPUT
	else
	echo "skip=false" >> $GITHUB_OUTPUT