After the per-node discovery change, discovery configs are published the
first time a snapshot for a node_id arrives (not eagerly at startup). The
two discovery integration tests (discovery_topics_appear_on_broker,
privacy_mode_suppresses_biometric_discovery) spawned the publisher with an
empty broadcast channel and never sent a snapshot, so they collected []
and failed ("missing presence discovery topic in []").
Drive snapshots for the test node_id throughout the capture window (same
pattern as state_messages_published_on_snapshot_broadcast) so the per-node
device's discovery lands. Verified against a local mosquitto: 3 passed.
ruv