feat(parser): normalize dot-compressed names in split()

Inserts spaces after dots when the cleaned name has no spaces but
contains dots, so the existing last-space fallback handles names
like "E.Rockstroh" and "Dr.Fr.Zarncke" correctly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/src/main/java/org/raddatz/familienarchiv/service/PersonNameParser.java

@@ -123,6 +123,11 @@ public class PersonNameParser {
 
         String cleaned = GEB_PATTERN.matcher(rawName).replaceAll("").trim();
 
+        // Normalize dot-compressed names: "Dr.Fr.Zarncke" -> "Dr. Fr. Zarncke"
+        if (!cleaned.contains(" ") && cleaned.contains(".")) {
+            cleaned = cleaned.replace(".", ". ").trim();
+        }
+
         String lastName = findKnownLastName(cleaned);
         if (lastName != null) {
             String firstName = cleaned.substring(0, cleaned.length() - lastName.length()).trim();