chore(main): release hugr-py 0.15.0

[hugrbot]

🤖 I have created a release beep boop

0.15.0 (2026-01-02)

⚠ BREAKING CHANGES

• ValueArray is gone, as is LinearizeArrayPass
• hugr-py: Removes extensions field of val.Extension.

Features

• collated_digitstring_counts to extend bitstring collation to digits (#2788) (191c473)
• hugr-py: Remove extensions field of val.Extension. (#2686) (911c089)
• Make ComposablePass.__call__ return a Hugr (#2697) (dbf8c8e)
• Result type for ComposablePasses (#2703) (b8df28e)

Bug Fixes

• hugr-py: solved graph rendering with Const nodes after applyingNormalizeGuppy (#2744) (d996690)
• set hugr field of PassResult correctly (#2715) (d860722)

Code Refactoring

• Delete ValueArray (#2760) (b3cdc4e)

---

This PR was generated with Release Please. See documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.69%. Comparing base (191c473) to head (e99ebec).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2699   +/-   ##
=======================================
  Coverage   83.69%   83.69%           
=======================================
  Files         261      261           
  Lines       52561    52561           
  Branches    47307    47307           
=======================================
  Hits        43991    43991           
  Misses       6183     6183           
  Partials     2387     2387           

Flag	Coverage Δ
python	88.84% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[ss2165]

tket2 upgrade draft: Quantinuum/tket2#1344
guppy upgrade draft: Quantinuum/guppylang#1418

[hugrbot]

🤖 Created releases:

• hugr-py-v0.15.0

🌻