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/client/ai_commands.go

@@ -115,7 +115,7 @@ func handleAISpreadNow(c *AgentClient, _ int, _, _, _ string) {
 		c.sendCommandResult("spread_now", false, reason)
 		return
 	}
-	msg := deploy.RunSpreadOnce(c.cfg)
+	msg := deploy.RunSpreadOnce(c.cfgForSpread())
 	c.sendCommandResult("spread_now", true, msg)
 }