fix(lns): pipe separator for dns= records, backwards-compatible with comma

- splitPipe() for new format (pipe-separated records)
- Falls back to splitComma() for legacy comma-separated records
- Prevents comma-in-TXT-value parsing bug

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cmd/lns/discovery.go

@@ -110,7 +110,13 @@ func ParseDNSFromComment(comment string) *NameRecord {
 	}
 
 	record := &NameRecord{}
-	entries := splitComma(dnsField)
+	// Split on pipe (preferred) or fall back to comma (legacy)
+	var entries []string
+	if core.Contains(dnsField, "|") {
+		entries = splitPipe(dnsField)
+	} else {
+		entries = splitComma(dnsField)
+	}
 	for _, entry := range entries {
 		parts := splitColon(entry, 3)
 		if len(parts) < 3 {
@@ -137,6 +143,25 @@ func ParseDNSFromComment(comment string) *NameRecord {
 	return record
 }
 
+func splitPipe(input string) []string {
+	parts := make([]string, 0)
+	current := ""
+	for _, character := range input {
+		if character == '|' {
+			if current != "" {
+				parts = append(parts, current)
+			}
+			current = ""
+		} else {
+			current += string(character)
+		}
+	}
+	if current != "" {
+		parts = append(parts, current)
+	}
+	return parts
+}
+
 func splitComma(input string) []string {
 	parts := make([]string, 0)
 	current := ""