Task-by-task plan covering: revert of prior ZHA commit, unstable
OTBR module import, OTBR enablement against the ZBT-2, firmware
flash via universal-silabs-flasher, rebuild on jupiter, and
end-to-end smoke test through the HA UI.
Designed for execution via superpowers:subagent-driven-development
or superpowers:executing-plans, with operator handoffs marked
explicitly (per the 'no SSH' workflow rule).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>