Type-hint pass on parley/preferences.py and parley/transcript.py

[5uper0]

Same shape as #14 (merged as #32, which covered consensus.py + agent.py): tighten the loose annotations in two core modules. Hints only — zero behaviour change. These two files are the red-line guard and the tamper-evidence record, so the diff must be provably inert: annotations and typing imports, nothing else.

What is wanted

parley/preferences.py:

• Evaluation.violated: list → List[str]
• PreferenceSheet.__init__: hard: Optional[list] → Optional[List[HardConstraint]]; annotate the instance attributes and add the missing -> None

parley/transcript.py:

• self.entries → List[dict] (annotate in __init__)
• record(self, option: Any, verdicts) — verdicts is a sequence of Verdict; hint it as Iterable[Verdict] with the import under typing.TYPE_CHECKING (plus from __future__ import annotations) so the module gains no new runtime import
• to_dict() -> dict and finalize(...) are already annotated; leave them

Match the style the #32 pass used (explicit typing.List/Optional imports, no from x import *).

How to verify

.venv/bin/pytest -q tests/test_preferences.py tests/test_transcript.py
.venv/bin/pytest -q

Identical pass/fail as before your change — the diff is annotations only.