cleanup: remove outdated workflows, update changelog

Removed obsolete workflow files:
- deploy-docs.yml (superseded by release.yml RTD trigger)
- deploy-wheels.yml.orig (backup file)
- test-management.yml (superseded by main.yml)

Updated documentation for v25.12.1 development release:
- docs/changelog.rst: Added Phase 1.4 modernization changes
- docs/releases.rst: Added v25.12.1 GitHub release link

Note: This work was completed with AI assistance (Claude Code).

Author: oberstet

.github/workflows/deploy-docs.yml

@@ -5,6 +5,24 @@
 Changelog
 =========
 
+25.12.1
+-------
+
+**Build Infrastructure Modernization (Phase 1.4)**
+
+* new: Migrated to ``pyproject.toml`` with Hatchling build backend (removed ``setup.py``, ``setup.cfg``, ``MANIFEST.in``)
+* new: Added ``uv.lock`` for reproducible dependency installations
+* new: Added ``justfile`` with comprehensive task recipes (~80 recipes)
+* new: Added ``.readthedocs.yaml`` for RTD v2 configuration
+* new: Modernized GitHub Actions workflows (``main.yml``, ``release.yml``)
+* new: Added integration tests running Autobahn examples against Crossbar.io
+* new: Added smoke tests for CLI, init, and lifecycle commands
+* new: Added ``docs/uvlock.rst`` documentation for uv.lock usage
+* new: Expanded Python version matrix: CPython 3.11-3.14, PyPy 3.11
+* new: Added ``py.typed`` marker for PEP 561 type checking support
+* fix: Removed outdated workflow files (``deploy-docs.yml``, ``test-management.yml``)
+* fix: Documentation restructured with Furo theme and sphinx-autoapi
+
 21.11.1
 -------
 

.github/workflows/deploy-wheels.yml.orig

@@ -5,6 +5,18 @@ This page provides links to release artifacts for each version of Crossbar.io.
 
 For detailed changelog entries, see :doc:`changelog`.
 
+25.12.1
+-------
+
+* `GitHub Release <https://github.com/crossbario/crossbar/releases/tag/master-202512180025>`__
+* Universal wheel (py3-none-any)
+* Source distribution (.tar.gz)
+
+.. note::
+
+   This is a development/nightly build from the modernization work.
+   For production use, install the latest stable release from PyPI.
+
 23.1.2
 ------