fix: disable attestations for Test PyPI to avoid conflict

[jeremyeder]

Problem

The release workflow (#154) failed when publishing to production PyPI with error:

Attestation generation failure: The following distributions already have publish attestations:
* /github/workspace/dist/agentready-2.12.0-py3-none-any.whl.publish.attestation
* /github/workspace/dist/agentready-2.12.0.tar.gz.publish.attestation

Root Cause

The pypa/gh-action-pypi-publish action creates .publish.attestation files during the first publish (Test PyPI). When we try to publish to production PyPI in the same workflow run, it attempts to create attestation files again, causing a conflict.

Solution

• Disable attestations for Test PyPI (we don't need them for testing)
• Keep attestations enabled for production PyPI (required for security)

Testing

This fix allows the workflow to:

1. Publish to Test PyPI without attestations
2. Publish to production PyPI with attestations
3. No file conflicts between the two publish steps

Result

After merging, the next release will successfully publish v2.12.0 (or next version) to both Test PyPI and production PyPI.

🤖 Generated with Claude Code