fix: publish Python SDK again and fail the release when it does not

[jonas-jonas]

Python 3.12 venvs no longer ship setuptools, so setup.py crashed and twine had nothing to upload. The step still reported success: the function runs inside an || list, which disables errexit, and the trailing to_git call returned 0. PyPI has been stuck at 1.22.28 (2026-03-11) while client-python kept getting commits and tags.

Now installs setuptools, chains the build and upload with &&, and returns 1 on failure so the push to client-python is skipped and the job goes red.

The same masking pattern exists in the typescript, typescript-fetch, php and ruby functions. Left out of this PR.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved Python package release reliability by ensuring build and upload steps stop immediately when a command fails.
  • Release builds now create both source and wheel distributions.
  • Cleans previous distribution artifacts before building.
  • Includes all required build tooling for packaging.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 49a7a70e-ee4c-4c1a-8e56-5478f9bc7626

📥 Commits

Reviewing files that changed from the base of the PR and between bc693c1 and 77c1166.

📒 Files selected for processing (1)

• scripts/release.sh

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📝 Walkthrough

Walkthrough

The release script now performs Python packaging and upload steps with fail-fast error handling. It installs both setuptools and wheel, removes dist, builds both distribution types, and returns failure when any step fails.

Changes

Release packaging

Layer / File(s)	Summary
Fail-fast Python packaging and upload scripts/release.sh	The Python release command removes dist, installs setuptools and wheel, builds source and wheel distributions, uploads them, and stops on failure.

Priority: ➖ Normal

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 77c11

The Python release upload accepts the quoted artifact pattern and retains fail-fast failure handling, so this change is ready to merge.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the Python SDK publishing fix and the release failure behavior.
Description check	✅ Passed	The description explains the publishing failure, its cause, the implemented fix, and the related out-of-scope functions. It does not include the template checklist or further comments sections, but th…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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