When a user's callback accidentally runs inference on the full image instead
of the provided slice, detections get incorrect offsets applied, causing a
repeating grid pattern. Add a validation check in _run_callback that emits a
SupervisionWarnings warning when any detection coordinate exceeds the slice
dimensions or is negative. An instance flag prevents repeated warnings across
many slices.
- Wrap _out_of_slice_bounds_warned check-and-set in threading.Lock to prevent duplicate warnings under ThreadPoolExecutor with thread_workers > 1
- Change stacklevel=2 to stacklevel=1 — under executor.submit the stacklevel=2 frame points into concurrent.futures internals, not user code
- Assert exactly 1 warning fires with thread_workers=4 (validates Lock fix)
- Assert no warning for detection touching but not exceeding slice boundary (pins > vs >= semantics)
- Assert second slicer call does not re-warn (documents once-per-instance semantic)
- Extract warning message into `msg` variable to satisfy E501 line-length limit
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Borda <6035284+Borda@users.noreply.github.com>
Co-authored-by: Claude Code <noreply@anthropic.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
* refactor: reorganize project structure and update module imports
* configure setuptools to use 'src' layout and adjust package discovery
* refactor: move tests to `tests` directory and update imports accordingly
* update lint and mypy configurations to align with `src` and `tests` structure
* update test imports to use corrected `tests.helpers` module path
* fix(pre_commit): 🎨 auto format pre-commit hooks
