Fix BRP084 dsiot energy consumption reporting

[kengggg]

Summary

• Register BRP084 dsiot energy consumption history after status parsing.
• Fall back to aggregate today_total_energy_consumption for today_energy_consumption when split cool/heat counters are unavailable.
• This addresses a downstream Home Assistant symptom where BRP084 devices can show zero daily energy despite aggregate dsiot week_power.datas data being present.

Details

BRP084 dsiot devices already parse aggregate weekly power data from week_power.datas; today_total_energy_consumption uses the last aggregate value as kWh. Some devices/firmware do not expose split curr_day_cool / curr_day_heat counters, so the inherited today_energy_consumption implementation returns 0 by summing two unavailable split values.

This keeps the inherited split-counter behavior when either cool or heat data exists, and only falls back to aggregate total energy when both split counters are unavailable.

The BRP084 status path also overrides the base update path, so this PR registers energy consumption history after BRP084 status parsing. That gives the estimated power path history to work from after aggregate energy changes.

Related: #119 is a broader BRP084 energy PR that adds yearly energy and optional cool/heat breakdown support. This PR is intentionally narrower and preserves aggregate-only behavior for devices that expose datas but not split counters.

Testing

• Existing BRP084 fixture with datas=[100,200,300,400,500,600,700] now asserts:
  • today_total_energy_consumption == 0.7
  • today_energy_consumption == 0.7
  • history total for today is 0.7
• Added sanitized real-shape regression with datas=[7300,8400,9900,7000,3000,900,900], expecting 0.9.
• uv run pytest tests/test_daikin_brp084.py -q -> 49 passed
• uv run pytest tests/test_energy_consumption.py tests/test_power_sensor.py -q -> 11 passed, 3 skipped
• uvx ruff check pydaikin/daikin_brp084.py tests/test_daikin_brp084.py -> passed
• Full uv run pytest -q -> 210 passed, 10 skipped

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 85.61%. Comparing base (788da58) to head (95eac7d).

Files with missing lines	Patch %	Lines
pydaikin/daikin_brp084.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #142      +/-   ##
==========================================
+ Coverage   85.60%   85.61%   +0.01%     
==========================================
  Files          12       12              
  Lines        1341     1349       +8     
==========================================
+ Hits         1148     1155       +7     
- Misses        193      194       +1     

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