build: update version to 8.1

Merge pull request #18 from johnnymillergh/main

Replace Poetry with uv for faster dependency resolution and installation.
This follows the same migration pattern used in python-web-service-boilerplate.

Migration includes:
- Convert pyproject.toml from Poetry format to PEP 621 standard
- Replace poetry.lock with uv.lock
- Update GitHub Actions workflows to use uv
- Update pre-commit hooks to use 'uv run' instead of 'poetry run'
- Modernize Dockerfile to use uv
- Update README.md with uv setup and usage instructions

All tests and linting pass with uv.

… ruff

…errors

- Change 'import test_python_boilerplate' to fully-qualified module imports
  in test_debounce_throttle.py and test_apscheduler_configuration.py so mypy
  can resolve the attr-defined references for mocker.spy()
- Add PLW0406 to per-file-ignores for tests/ since fully-qualified self-imports
  trigger the module-imports-itself warning

…ame__]

The test modules were importing themselves (e.g., import test_python_boilerplate.common.test_debounce_throttle) solely to pass the module to mocker.spy(). This triggered PLW0406 (module-imports-itself) and PLC0415 (import-not-at-top-level) lint suppressions.

Replace with the idiomatic sys.modules[__name__] pattern and remove the now-unnecessary PLW0406/PLC0415 entries from pyproject.toml per-file-ignores.

pyinstrument 5.1.2 uses a C-level ProfilerState object via sys.setprofile() that is not a callable Python function. pytest-benchmark's PauseInstrumentation saves and restores the profiler via sys.setprofile(), which fails with TypeError on the non-callable ProfilerState.

Skip the auto_profile fixture for tests using the benchmark fixture, since profiling during benchmarks is counterproductive anyway (adds overhead that corrupts measurements).

…deferred side effects

- Adopt PEP 695 type parameter syntax in profiling.py and debounce_throttle.py
- Remove unnecessary `from __future__ import annotations` in asynchronization.py and debounce_throttle.py
- Extract _make_profile_decorator factory to DRY elapsed_time, mem_profile, and cpu_profile
- Defer loguru handler setup into configure() and SMTP login into init_smtp()
- Rename retain_log_files to _retain_log_files (private, called only by configure)
- Fix stale README: consolidate black/isort/flake8 references to Ruff, remove duplicate poetry section, fix Python badge
- Bump actions/checkout v2/v3 to v4, docker-build-with-cache-action v2 to v6
- Add py.typed marker for PEP 561 compliance

…ration for compatibility