(WIP) fix(build): pre-commit/CI checks fail on a clean main

[RedCanti]

fix(build): pre-commit/CI checks fail on a clean main

Description

Two repository tooling checks fail on a fresh checkout of main, independent of any feature code:

• pdm.lock content hash is stale. It was generated by an older PDM, so pdm lock --check (and frozen installs / CI) fail under PDM 2.27.0 even though no dependencies changed. This PR regenerates the hash no dependency versions are altered (only the content_hash line changes).
• Towncrier fragments directory. [tool.towncrier] omitted directory, so towncrier resolved fragments to <package_dir>/<package>/newsfragments (peat/PEAT/newsfragments), which does not exist. Fragments actually live in the top-level newsfragments/ (per CONTRIBUTING.rst), so towncrier build/check silently found nothing, meaning any branch adding a fragment fails the towncrier-check pre-commit hook. This PR sets directory = "newsfragments".

Verified locally: pdm lock --check to a clean exit, then pdm run towncrier build --draft now renders fragments under Features; full suite passes (364 passed, 18 skipped).

Related Issue

Closes: #65

Checklist

• This PR conforms to the process detailed in the Contributing Guide
• I have included no proprietary/sensitive information in my code
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation - N/A no documentation changes required.
• My changes generate no new warnings
• I have tested my code
• I have added a description of my changes to the changelog in CHANGELOG.rst
• Apply appropriate Tags to this PR, if any (e.g. bugfix, enhancement(feature), documentation, etc.)
• Removing "Draft" status from the PR (if applicable).