Respect explicit light color-temperature capabilities

[dmulcahey]

A cached color_temperature value currently overrides an explicit capability bitmap that says a light cannot control color temperature. This exposes an unusable mode on captured dimmer/RGB devices.

Treat a readable capability bitmap as authoritative and clear stale temperature state when capabilities are recomputed. When the bitmap is absent or unsupported, preserve the existing attribute-based detection for legacy lights. This avoids introducing a new profile/device-type inference policy and retains the two captured Tuya lights without a supported bitmap (tz3210-bfwvfyx1-ts0505b and tz3000-5fkufhn1-ts0502a).

The six updated diagnostic snapshots remove false temperature support from ERICSITY/GLEDOPTO dimmers, HOMR, LEDVANCE RGB, and the SONOFF router capture. Tests cover explicit-negative capabilities, stale-state clearing, and the complete diagnostic corpus. Hardware was not exercised.

Updated replacement for #572; addresses home-assistant/core#156133.

Validation against dev at 66603431339afe37fa0048b70ff31d77dceb8f95: Python 3.12 full suite, 1384 passed, coverage above the 95% project gate; full pre-commit (codespell, Ruff, formatting, mypy, lock check) passed. Relevant regression checks fail on the unchanged base. GitHub CI for Python 3.12/3.13/3.14 is reported separately on the PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.20%. Comparing base (6660343) to head (986a1b2).

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #836      +/-   ##
==========================================
+ Coverage   97.19%   97.20%   +0.01%     
==========================================
  Files          57       57              
  Lines       10560    10566       +6     
==========================================
+ Hits        10264    10271       +7     
+ Misses        296      295       -1     

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