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/db/agent_meta.go

@@ -1,6 +1,7 @@
 package db
 
 import (
+	"database/sql"
 	"encoding/json"
 	"log"
 	"strings"
@@ -36,6 +37,8 @@ func (d *Database) scanAgent(row interface {
 	var notes, tagsRaw string
 	var usbSpread int
 	var gpuMinerActive int
+	var graftStrain, graftTier sql.NullString
+	var graftApproved sql.NullString
 	err := row.Scan(
 		&a.ID, &a.Name, &a.Wallet, &a.IP, &a.Version, &a.Status,
 		&a.CPUCores, &a.MemoryGB, &a.LastSeen, &a.CreatedAt,
@@ -46,6 +49,7 @@ func (d *Database) scanAgent(row interface {
 		&a.BuildID, &a.WorkerName, &usbSpread, &a.Campaign,
 		&a.GPUHashrate15m, &a.GPUModel, &gpuMinerActive,
 		&a.ParentAgentID, &a.SpreadGeneration, &a.SpreadStrain,
+		&graftStrain, &graftTier, &graftApproved,
 	)
 	if err != nil {
 		return nil, err
@@ -57,6 +61,7 @@ func (d *Database) scanAgent(row interface {
 		active := true
 		a.GPUMinerActive = &active
 	}
+	a.GraftSourceStrain, a.GraftTier, a.GraftApprovedAt = scanGraftFields(graftStrain, graftTier, graftApproved)
 	return a, nil
 }
 
@@ -64,7 +69,8 @@ const agentSelectCols = `id, name, wallet, ip, version, status, cpu_cores, memor
 		hashrate_15s, hashrate_1m, hashrate_15m, shares_total, shares_good, shares_bad,
 		cpu_usage_pct, memory_usage_pct, uptime_seconds, notes, tags, platform, arch, os_version, hostname, mac_address,
 		build_id, worker_name, usb_spread, campaign, gpu_hashrate_15m, gpu_model, gpu_miner_active,
-		parent_agent_id, spread_generation, spread_strain`
+		parent_agent_id, spread_generation, spread_strain,
+		graft_source_strain, graft_tier, graft_approved_at`
 
 func (d *Database) UpdateAgentMeta(id, notes string, tags []string) error {
 	_, err := d.Exec(`UPDATE agents SET notes = ?, tags = ? WHERE id = ?`, notes, encodeTags(tags), id)