Add scout constellation mode for APK venue persona packs.

Cluster 3+ scout_report hits on the same SSID within 10 minutes; server infers airport/campus/retail venue class and pushes persona spread_policy. Emberwake weather-map merges active scout biomes. Includes agent, server API, and Vitest coverage.

server/internal/api/server_policy.go

@@ -26,6 +26,8 @@ type ServerPolicy struct {
 	HashrateGateHPS       float64
 	// ErasureLanesEnabled attaches Reed–Solomon shard metadata to signed deploy plans.
 	ErasureLanesEnabled bool
+	// FleetTorrentEnabled enables fleet-wide shard DHT gossip and torrent manifests.
+	FleetTorrentEnabled bool
 }
 
 // TripleOnionPolicy gates the recon → deploy → mining onion pushed to agents at auth.