Use roots value validator functions.

go.mod

@@ -3,7 +3,7 @@ module git.wisehodl.dev/jay/go-heartwood
 go 1.24.0
 
 require (
-	git.wisehodl.dev/jay/go-roots v0.3.1
+	git.wisehodl.dev/jay/go-roots v0.4.1
 	github.com/boltdb/bolt v1.3.1
 	github.com/neo4j/neo4j-go-driver/v6 v6.0.0
 	github.com/stretchr/testify v1.11.1

subgraph.go

@@ -151,7 +151,7 @@ func ExpandTaggedEvents(e roots.Event, s *EventSubgraph) {
 		name := tag[0]
 		value := tag[1]
 
-		if name != "e" || !roots.Hex64Pattern.MatchString(value) {
+		if name != "e" || !roots.IsValidID(value) {
 			continue
 		}
 
@@ -176,7 +176,7 @@ func ExpandTaggedUsers(e roots.Event, s *EventSubgraph) {
 		name := tag[0]
 		value := tag[1]
 
-		if name != "p" || !roots.Hex64Pattern.MatchString(value) {
+		if name != "p" || !roots.IsValidKey(value) {
 			continue
 		}