feat: compose Q10 map content from grouped traits

[tubededentifrice]

Summary

Final PR in the Python-roborock#848 split: integrates the pure renderer through a low-level/high-level trait boundary based on maintainer feedback about mutable state and mixed update sources.

This fork-local draft is stacked on Python-roborock#885, so its incremental diff contains only trait/API/CLI integration. It can be promoted upstream once Python-roborock#885 lands.

State ownership

• MapDpsTrait owns restricted-zone and virtual-wall DPS values.
• MapContentTrait groups the latest map and trace protocol packets in one immutable Q10MapSource.
• Rendering receives the map packet, trace packet, and decoded DPS overlay snapshot and returns one composed PNG.
• The trait caches only that image; calibration, layers, projected MapData, and rendering intermediates are not exposed.
• Rooms and trace information are read directly from their owning source packets.
• DPS, map, or trace updates replace the relevant source snapshot and regenerate the same image output.

The stale layer-export CLI was removed. The path-specific CLI only waits for a live trace and saves the trait's normal image_content; it does not invoke an alternate renderer.

Validation

• Focused map/trait suite — 88 passed
• pytest -q — 797 passed, 86 snapshots passed
• pre-commit run --show-diff-on-failure --color=always --all-files — all hooks passed, including ruff and mypy

Stack

1. feat: compose Q10 maps in a pure renderer Python-roborock/python-roborock#885 — pure single-path renderer
2. This PR — trait ownership and integration

[tubededentifrice]

Superseded by upstream PR Python-roborock#886 after Python-roborock#885 merged. The branch was updated incrementally and its history was not rewritten.