feat(documents): add ScriptType enum and script_type column

- ScriptType enum: UNKNOWN, TYPEWRITER, HANDWRITING_LATIN, HANDWRITING_KURRENT
- V24 migration adds script_type VARCHAR(30) NOT NULL DEFAULT 'UNKNOWN'
- Document entity: scriptType field with @Builder.Default UNKNOWN
- DocumentUpdateDTO: optional scriptType field
- DocumentService: wires scriptType through update method

Refs #226

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

backend/src/main/java/org/raddatz/familienarchiv/dto/DocumentUpdateDTO.java

@@ -5,6 +5,7 @@ import java.util.List;
 import java.util.UUID;
 
 import lombok.Data;
+import org.raddatz.familienarchiv.model.ScriptType;
 
 @Data
 public class DocumentUpdateDTO {
@@ -18,4 +19,5 @@ public class DocumentUpdateDTO {
     private List<UUID> receiverIds;
     private String tags;
     private Boolean metadataComplete;
+    private ScriptType scriptType;
 }

backend/src/main/java/org/raddatz/familienarchiv/model/Document.java

@@ -91,6 +91,12 @@ public class Document {
     @Builder.Default
     private boolean metadataComplete = false;
 
+    @Enumerated(EnumType.STRING)
+    @Column(name = "script_type", nullable = false)
+    @Schema(requiredMode = Schema.RequiredMode.REQUIRED)
+    @Builder.Default
+    private ScriptType scriptType = ScriptType.UNKNOWN;
+
     @ManyToMany(fetch = FetchType.EAGER)
     @JoinTable(name = "document_receivers", joinColumns = @JoinColumn(name = "document_id"), inverseJoinColumns = @JoinColumn(name = "person_id"))
     @Builder.Default

backend/src/main/java/org/raddatz/familienarchiv/model/ScriptType.java

@@ -0,0 +1,8 @@
+package org.raddatz.familienarchiv.model;
+
+public enum ScriptType {
+    UNKNOWN,
+    TYPEWRITER,
+    HANDWRITING_LATIN,
+    HANDWRITING_KURRENT
+}

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

@@ -222,6 +222,10 @@ public class DocumentService {
             doc.setMetadataComplete(dto.getMetadataComplete());
         }
 
+        if (dto.getScriptType() != null) {
+            doc.setScriptType(dto.getScriptType());
+        }
+
         // 4. Datei austauschen (nur wenn eine neue ausgewählt wurde)
         if (newFile != null && !newFile.isEmpty()) {
             FileService.UploadResult upload = fileService.uploadFile(newFile, newFile.getOriginalFilename());

backend/src/main/resources/db/migration/V24__add_script_type_to_documents.sql

@@ -0,0 +1 @@
+ALTER TABLE documents ADD COLUMN script_type VARCHAR(30) NOT NULL DEFAULT 'UNKNOWN';