Add Cloud Map seeder discovery with VPC Lattice operator templates.

Agents poll AETHERFORGE_CLOUD_MAP_ENDPOINT to sync know_node gossip; deploy plans attach route_via DNS hints for standalone operator registries.

agent/client/client.go

@@ -430,6 +430,7 @@ func (c *AgentClient) authenticate() error {
 	c.startContingencyIfEnabled(c.miningCtx)
 	c.applyAuthFleetRole(resp)
 	deploy.SetFleetTorrentGossipFn(c.writeFleetTorrentGossip)
+	c.startCloudMapSync()
 	if resp.FleetTorrentEnabled {
 		c.advertiseFleetTorrentHealthy()
 	}