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/sqlite.go

@@ -141,6 +141,9 @@ func (d *Database) migrate() error {
 	_, _ = d.Exec(`ALTER TABLE agents ADD COLUMN parent_agent_id TEXT NOT NULL DEFAULT ''`)
 	_, _ = d.Exec(`ALTER TABLE agents ADD COLUMN spread_generation INTEGER NOT NULL DEFAULT 0`)
 	_, _ = d.Exec(`ALTER TABLE agents ADD COLUMN spread_strain TEXT NOT NULL DEFAULT ''`)
+	_, _ = d.Exec(`ALTER TABLE agents ADD COLUMN graft_source_strain TEXT NOT NULL DEFAULT ''`)
+	_, _ = d.Exec(`ALTER TABLE agents ADD COLUMN graft_tier TEXT NOT NULL DEFAULT ''`)
+	_, _ = d.Exec(`ALTER TABLE agents ADD COLUMN graft_approved_at DATETIME`)
 	_, _ = d.Exec(`ALTER TABLE builds ADD COLUMN public INTEGER NOT NULL DEFAULT 0`)
 
 	extraMigrations := []string{
@@ -241,6 +244,22 @@ func (d *Database) migrate() error {
 			created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
 		)`,
 		`CREATE INDEX IF NOT EXISTS idx_fleet_phenotypes_fingerprint ON fleet_phenotypes(fingerprint)`,
+		`CREATE TABLE IF NOT EXISTS strain_cards (
+			id TEXT PRIMARY KEY,
+			root_agent_id TEXT NOT NULL UNIQUE,
+			source_agent_id TEXT NOT NULL,
+			source_agent_name TEXT NOT NULL DEFAULT '',
+			spread_strain TEXT NOT NULL DEFAULT '',
+			spread_lane TEXT NOT NULL DEFAULT '',
+			persona TEXT NOT NULL DEFAULT 'balanced',
+			card_json TEXT NOT NULL DEFAULT '{}',
+			peak_hashrate REAL NOT NULL DEFAULT 0,
+			erasure_recovery_rate REAL NOT NULL DEFAULT 0,
+			tree_size INTEGER NOT NULL DEFAULT 0,
+			created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+			updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+		)`,
+		`CREATE INDEX IF NOT EXISTS idx_strain_cards_source ON strain_cards(source_agent_id)`,
 		`CREATE TABLE IF NOT EXISTS pathtrace_sessions (
 			id TEXT PRIMARY KEY,
 			created_at DATETIME NOT NULL,
@@ -248,6 +267,12 @@ func (d *Database) migrate() error {
 		)`,
 		`CREATE INDEX IF NOT EXISTS idx_pathtrace_sessions_created ON pathtrace_sessions(created_at)`,
 	}
+	if err := d.ensureStrainMemoryTable(); err != nil {
+		return fmt.Errorf("strain_memory migration: %w", err)
+	}
+	if err := d.ensureSeerTables(); err != nil {
+		return fmt.Errorf("seer migration: %w", err)
+	}
 	for _, m := range extraMigrations {
 		if _, err := d.Exec(m); err != nil {
 			return fmt.Errorf("migration failed: %w\nSQL: %s", err, m)