ci(repo): add least-privilege permissions to GitHub Actions workflows

[peter-matkovski]

Summary

• Add explicit least-privilege permissions blocks to workflow files flagged by CodeQL.
• Scopes derived from workflow operations (build, artifacts, Danger, release git push).
• Resolves 10 open actions/missing-workflow-permissions alerts.

Linear

• Parent: APPSEC-164

Test plan

• CI green
• Code scanning alerts close after merge

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1b83e999-1420-4382-b1d3-a696905288e9

📥 Commits

Reviewing files that changed from the base of the PR and between 36559fb and 6fa02c4.

📒 Files selected for processing (7)

• .github/workflows/beta_version_analyze.yml
• .github/workflows/legacy_version_analyze.yml
• .github/workflows/pana.yml
• .github/workflows/pr_title.yml
• .github/workflows/publish_gallery.yml
• .github/workflows/stream_core_flutter_workflow.yml
• .github/workflows/update_goldens.yml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/workflow-least-privilege-permissions

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45.80%. Comparing base (36559fb) to head (6fa02c4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #127   +/-   ##
=======================================
  Coverage   45.80%   45.80%           
=======================================
  Files         178      178           
  Lines        7243     7243           
=======================================
  Hits         3318     3318           
  Misses       3925     3925           

☔ View full report in Codecov by Harness.
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