Require subscription_store in BridgeUseCases and route timer, OPTIONS,
static TG, and OBP mutations through store ops with export-only BRIDGES shim.
Fix dashboard YAML static TG fallback and sole-hotspot monitor remap for
dynamic UA when a bridge leg is active.
Subscription store and router are always active when wired at bootstrap;
drop YAML toggles and flag-off test paths. Sync router into store before
get_bridges() export and after make_static_tg mutations.
Sync subscription store after timer and in-band mutations, add optional
store authority with BRIDGES export shim, wire MeshCodecRegistry into
OBP udp_hbp paths, and extend harness parity tests.
Enforce strict SINGLE=1 RX exclusivity, always filter inject-only downlink by
each peer's own OPTIONS, and push self-service DB options only after PASS=.
Stop merged SYSTEM static TG lists from leaking across hotspots in topology.