Use workflow_dispatch instead of workflow_call for releases

[sdimitro]

PyPI trusted publishing doesn't support reusable workflows, so switch to a two-step manual process:

1. Run "Cut Release" to create the tag and bump version
2. Run "Release" manually with the tag to publish to PyPI

Changes:

• release.yml: Replace workflow_call with workflow_dispatch, add tag input
• cut-release.yml: Remove the release job that called release.yml, update summary with instructions for the next step

https://claude.ai/code/session_01EbCZH6NCwRCDVVgu68bc9L

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.60%. Comparing base (5b98d27) to head (e28d678).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #11   +/-   ##
========================================
  Coverage    92.60%   92.60%           
========================================
  Files            5        5           
  Lines          757      757           
========================================
  Hits           701      701           
  Misses          56       56           

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