chore: typo in refresh view comment and add note about node type func

NodeTypeName is fine as is with possible concatenation
of the value as there is unlikely to be more than 256
node types

cmd/beacon/main.go

@@ -147,7 +147,7 @@ func main() {
 		}
 	}
 
-	// refresh meterialized views on boot or restart to stay fresh
+	// refresh materialized views on boot or restart to stay fresh
 	refreshMaterializedViews(ctx, store)
 
 	// ── Seed config data ─────────────────────────────────────────────────────

internal/api/nodes.go

@@ -64,6 +64,7 @@ type Node struct {
 }
 
 // NodeTypeName returns a human-readable name for a node type integer.
+// NOTE: truncation is fine here until there are at least over 200 types of node
 func NodeTypeName(t int16) string {
 	switch byte(t) {
 	case meshcore.AdvertTypeChat: