chore(py): release tket-py 0.12.3

[hugrbot]

🤖 I have created a release beep boop

0.12.3 (2025-08-22)

Features

• Explicit exports for tket_exts ops and types (#1046) (a32873e)

Bug Fixes

• Fix erroneous parameters being decoded from pytket for qsystem gates (#1061) (cd42644)

---

This PR was generated with Release Please. See documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.98%. Comparing base (9a1b555) to head (475fb55).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1063   +/-   ##
=======================================
  Coverage   78.98%   78.98%           
=======================================
  Files         115      115           
  Lines       13389    13389           
  Branches    12607    12607           
=======================================
  Hits        10575    10575           
  Misses       2160     2160           
  Partials      654      654           

Flag	Coverage Δ
python	92.83% <100.00%> (ø)

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[aborgna-q]

I say we can ignore the release check fail:

tket-py/tket/extensions/init.py:17: error: Module "tket_exts" has no attribute "bool" [attr-defined]
https://github.com/CQCL/tket2/actions/runs/17160316462/job/48687663355?pr=1063#step:7:16

That's inside a try import block

tket2/tket-py/tket/extensions/__init__.py

Lines 15 to 19 in a32873e

	# TODO: Remove once tket no longer supports tket-exts 0.10.*
	try:
	from tket_exts import bool
	except ImportError:
	bool = opaque_bool # type: ignore[assignment]

[hugrbot]

🤖 Created releases:

• tket-py-v0.12.3

🌻