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.

server/internal/cloudmap/registry.go

@@ -38,4 +38,28 @@ func NormalizeRegistryDocument(doc RegistryDocument) (RegistryDocument, bool) {
 		doc.Service = "seeder"
 	}
 	return doc, doc.Namespace != "" && doc.Service != ""
-}
+}
+
+func KnowNodeTargets(doc RegistryDocument) []string {
+	doc, ok := NormalizeRegistryDocument(doc)
+	if !ok {
+		return nil
+	}
+	seen := make(map[string]bool)
+	var out []string
+	for _, inst := range doc.Instances {
+		if !inst.Healthy {
+			continue
+		}
+		id := strings.TrimSpace(inst.AgentID)
+		if id == "" {
+			id = strings.TrimSpace(inst.DNSName)
+		}
+		if id == "" || seen[id] {
+			continue
+		}
+		seen[id] = true
+		out = append(out, id)
+	}
+	return out
+}