refactor(parser): expand SplitName record to 5 fields

Add title, maidenName, and annotation fields (all nullable) to
SplitName. All existing call sites pass null for new fields. Test
assertions updated to document the null-by-default contract.

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

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

@@ -23,7 +23,13 @@ public class PersonNameParser {
     private static final Pattern MULTI_SEPARATOR = Pattern.compile("\\s+(?:und|u)\\s+");
     private static final Pattern SLASH_SEPARATOR = Pattern.compile("//");
 
-    public record SplitName(String firstName, String lastName) {}
+    public record SplitName(
+            String title,
+            String firstName,
+            String lastName,
+            String maidenName,
+            String annotation
+    ) {}
 
     /**
      * Parses the "An" field from the ODS into individual normalised name strings.
@@ -118,7 +124,7 @@ public class PersonNameParser {
      */
     public static SplitName split(String rawName) {
         if (rawName == null || rawName.isBlank()) {
-            return new SplitName("?", "?");
+            return new SplitName(null, "?", "?", null, null);
         }
 
         String cleaned = GEB_PATTERN.matcher(rawName).replaceAll("").trim();
@@ -132,15 +138,15 @@ public class PersonNameParser {
         if (lastName != null) {
             String firstName = cleaned.substring(0, cleaned.length() - lastName.length()).trim();
             if (firstName.isBlank()) firstName = cleaned;
-            return new SplitName(firstName, lastName);
+            return new SplitName(null, firstName, lastName, null, null);
         }
 
         int lastSpace = cleaned.lastIndexOf(' ');
         if (lastSpace > 0) {
-            return new SplitName(cleaned.substring(0, lastSpace).trim(), cleaned.substring(lastSpace + 1).trim());
+            return new SplitName(null, cleaned.substring(0, lastSpace).trim(), cleaned.substring(lastSpace + 1).trim(), null, null);
         }
 
-        return new SplitName(cleaned, "?");
+        return new SplitName(null, cleaned, "?", null, null);
     }
 
     /** Returns the known last name that the given string ends with, or null. */

backend/src/test/java/org/raddatz/familienarchiv/service/PersonNameParserTest.java

@@ -81,6 +81,9 @@ class PersonNameParserTest {
         PersonNameParser.SplitName result = PersonNameParser.split("Walter de Gruyter");
         assertThat(result.firstName()).isEqualTo("Walter");
         assertThat(result.lastName()).isEqualTo("de Gruyter");
+        assertThat(result.title()).isNull();
+        assertThat(result.maidenName()).isNull();
+        assertThat(result.annotation()).isNull();
     }
 
     @Test
@@ -107,22 +110,31 @@ class PersonNameParserTest {
     @Test
     void split_gebAnnotation_stripped() {
         PersonNameParser.SplitName result = PersonNameParser.split("Eugenie de Gruyter geb. Müller");
+        assertThat(result.title()).isNull();
         assertThat(result.firstName()).isEqualTo("Eugenie");
         assertThat(result.lastName()).isEqualTo("de Gruyter");
+        assertThat(result.maidenName()).isNull();
+        assertThat(result.annotation()).isNull();
     }
 
     @Test
     void split_null_returnsPlaceholder() {
         PersonNameParser.SplitName result = PersonNameParser.split(null);
+        assertThat(result.title()).isNull();
         assertThat(result.firstName()).isEqualTo("?");
         assertThat(result.lastName()).isEqualTo("?");
+        assertThat(result.maidenName()).isNull();
+        assertThat(result.annotation()).isNull();
     }
 
     @Test
     void split_blank_returnsPlaceholder() {
         PersonNameParser.SplitName result = PersonNameParser.split("   ");
+        assertThat(result.title()).isNull();
         assertThat(result.firstName()).isEqualTo("?");
         assertThat(result.lastName()).isEqualTo("?");
+        assertThat(result.maidenName()).isNull();
+        assertThat(result.annotation()).isNull();
     }
 
     @Test