fix: select latest V1 cleaning record regardless of response order

[vize69]

Problem

The Qrevo Edge 2 Flow (roborock.vacuum.a328) returns clean record IDs in ascending order. CleanSummaryTrait.refresh() currently requests records[0], so consumers receive the oldest cleaning as last_clean_record.

Change

Select the maximum timestamp record ID without changing the returned records list. Empty-history behavior and the number of RPC requests remain unchanged.

Adds parametrized tests to the existing clean-summary suite for ascending, descending, unordered and single-record responses, asserting the emitted request and public last_clean_record.

Validation

Base: 1269a8d.

• New regression cases on unchanged code: 2 failed, 8 passed.
• Fixed clean-summary suite: 10 passed.
• Full default suite on Python 3.12: 1455 passed, 11 deselected (MQTT broker tests), 53 xfailed; 96 snapshots passed.
• uv run pre-commit run --all-files: passed, including Ruff, Mypy and Codespell.

Synthetic record IDs only; no diagnostics or credentials included. No commands were sent to hardware during this validation.

Fixes #976.