Add release script

[arikfr]

Summary

• Adds bin/release — a single script that automates the full release process for both major and patch releases
• Removes bin/release_manager.py and bin/get_changes.py which used an older RC-based workflow that no longer matches our process

Major release (bin/release major)

1. Validates state (on master, clean worktree, branch/tag don't exist)
2. Creates release branch (e.g., v26.3) from master
3. Generates changelog from merged PRs, opens $EDITOR for review, writes to CHANGELOG.md
4. Updates version in package.json, redash/__init__.py, pyproject.toml
5. Commits and pushes
6. Creates GitHub release with auto-generated notes
7. Triggers Docker image build (preview-image.yml with dockerRepository=redash)
8. Opens a PR (changelog/v26.3.0 → master) with just the CHANGELOG.md update

Patch release (bin/release patch)

Same flow but run from an existing release branch after cherry-picking fixes. Bumps the patch version and generates changelog from commits since the last tag.

Subcommands for testing individual steps

Each step is also available as a standalone subcommand:

bin/release check-major          # validate state
bin/release check-patch          # validate state
bin/release changelog ...        # generate entries to stdout
bin/release update-version ...   # update version files
bin/release update-changelog ... # generate + edit + write CHANGELOG.md
bin/release create-release ...   # create GitHub release
bin/release build-image ...      # trigger Docker build
bin/release changelog-pr ...     # PR changelog back to master

Test plan

• bin/release major --dry-run — validates checks, shows planned steps
• bin/release patch --dry-run — validates checks on release branch
• bin/release check-major — correctly detects existing branch/tag
• bin/release check-patch — correctly detects missing commits
• bin/release changelog 26.3.0 --since-tag v25.8.0 — generates entries from PRs
• bin/release update-version 99.9.9 — updates all three files correctly
• bin/release build-image --ref v26.3 --dry-run — shows correct command
• bin/release create-release v99.9.9 --target v26.3 --dry-run — shows correct command
• bin/release changelog-pr 26.3.0 --release-branch v26.3 --dry-run — shows correct flow

🤖 Generated with Claude Code

[cubic-dev-ai]

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