Feat/docker shell edition (#804)

* fix(ci): secrets can't be used in step if conditions [skip-regression-check] (#787)

GitHub Actions step-level `if:` doesn't have access to `secrets` context.
Replace `if: secrets.X != ''` with `continue-on-error: true` and let
the Set token step handle the fallback.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(ci): clean up staging pipeline — remove hacks, skip redundant checks [skip-regression-check] (#794)

- Remove continue-on-error from staging-ci.yml app token steps (secrets are configured)
- Skip test.yml and code_style.yml on PRs targeting staging (staging-ci.yml
  already runs tests before promoting, promotion PR gets full CI on main)
- Allow ironclaw-ci[bot] in Claude Code review for bot-created promotion PRs

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Henry Park <henrypark133@gmail.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/code_style.yml

@@ -1,6 +1,8 @@
 name: Code Style
 on:
   pull_request:
+    branches:
+      - main
 
 jobs:
   format: