After zero-pre-baked discovery, session_loop now sweeps each fixture
(DEVICE_INFO with E1.20 PD decode + raw hex, DMX_START_ADDRESS,
DEVICE_LABEL / MODEL_DESCRIPTION / SOFTWARE_VERSION / MANUFACTURER_LABEL)
with a 2-round retry for the flaky RDM window arm, prints a per-fixture
parameter summary, then enters a 6s status-poll cycle: one compact line
per fixture per cycle, address/footprint changes reported as alarms, and
playback follows a changed DMX address automatically. Duplicate uplinks
from the flag=00/01 pair copies are deduped; the playback address list
is kept per-UID (no more duplicate control-address entries).
0a183e449c