feat(mower): add GOAT O1200 control support

[monsivar]

Summary

Add physically verified mower-control support for the ECOVACS GOAT O1200 LiDAR (2i0fns).

This adds support for:

• automatic mowing
• single-area mowing
• multi-area mowing
• start
• pause
• resume
• stop

The implementation is based on captured traffic from the official ECOVACS app and direct verification against a physical O1200.

Observed protocol

The O1200 uses the clean command, not clean_V2.

Automatic mowing

{act:start,content:{type:auto}}
{act:pause,content:{type:auto}}
{act:resume,content:{type:auto}}
{act:stop,content:{type:auto}}

Area mowing

Single-area start:

{act:start,content:{type:spotArea,value:1}}

Multi-area start was physically verified with area IDs 1,2:

{act:start,content:{type:spotArea,value:1,2}}

Pause/resume/stop preserve the active spotArea mode:

{act:pause,content:{type:spotArea}}
{act:resume,content:{type:spotArea}}
{act:stop,content:{type:spotArea}}

The area ID order is preserved when serializing multiple areas.

Implementation

• Add GoatClean using the observed clean wire format.
• Add GoatCleanArea for single- and multi-area mowing.
• Add GoatCleanModeEvent to retain the active mower mode (auto or spotArea) for pause/resume/stop.
• Record the observed mode from onCleanInfo.
• Wire the O1200 (2i0fns) clean capability to the GOAT-specific commands.
• Keep existing generic Clean / CleanV2 behavior unchanged for other devices.

Unsupported mower modes are rejected rather than inferred. customArea, freeClean, non-integer area IDs, empty area lists, and cleanings != 1 are not accepted.

Physical verification

Two complete control sequences were executed through this implementation against the O1200.

Automatic mowing: START -> PAUSE -> RESUME -> STOP

All commands returned ret=ok, and the tracked GOAT mode remained auto.

Multi-area mowing: areas 1,2, START -> PAUSE -> RESUME -> STOP

The start command used exactly:

{act:start,content:{type:spotArea,value:1,2}}

All commands returned ret=ok; state transitioned through cleaning/paused/cleaning/idle and the tracked GOAT mode remained spotArea.

Tests

• mower-control tests: 49 passed
• targeted mypy: passed
• git diff --check: passed

The full tests/hardware/test_init.py run was attempted locally but is blocked by existing malformed placeholder hardware files (itk04l.py and 02qwum.py) in the checkout; those files are unrelated to this diff.

Scope / related work

This PR is intentionally limited to O1200 mower controls and does not include settings, map work, or Home Assistant changes.

There is some conceptual overlap with #1515, which introduces a more generic CleanMower implementation for other mower devices. The O1200 traffic captured here differs in an important way: pause/resume/stop must preserve the active auto or spotArea content type, and area mowing uses the observed comma-separated area IDs. This PR therefore keeps the change model-specific and does not alter other mower profiles.

Related to #1610.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.35%. Comparing base (5453eba) to head (d49a292).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1791      +/-   ##
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+ Coverage   96.26%   96.35%   +0.08%     
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  Files         161      161              
  Lines        6399     6439      +40     
  Branches      368      376       +8     
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+ Hits         6160     6204      +44     
+ Misses        172      170       -2     
+ Partials       67       65       -2     

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[codspeed-hq]

Merging this PR will not alter performance

✅ 226 untouched benchmarks

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_{Comparing monsivar:feature/ecovacs-mower-controls (d49a292) with dev (5453eba)}