Bump version to 2026.1.0dev0 #1284

Job	Run time
Collect information & changes data	1s
Prepare dependencies	1s
Prepare pre-commit base	1s
Check ${{ matrix.file }}	1s
Check all requirements	1s
Check other linters	1s
Check ruff-format	1s
Check pylint	1s
Audit licenses	1s
Check pylint on tests	1s
Dependency review	1s
Check hassfest	1s
Check ruff	1s
Check mypy	1s
Run ${{ matrix.postgresql-group }} tests Python ${{ matrix.python-version }}	1s
Run tests Python ${{ matrix.python-version }} (${{ matrix.group }})	1s
Run ${{ matrix.mariadb-group }} tests Python ${{ matrix.python-version }}	1s
Run tests Python ${{ matrix.python-version }} (${{ matrix.group }})	1s
Split tests for full run	1s
Upload test results to Codecov	1s
Upload test coverage to Codecov (partial suite)	1s
Upload test coverage to Codecov (full suite)	1s
	22s

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