feat: add uploader_role to ticket attachments

src/main/java/com/ucms_backend/dto/AttachmentResponse.java

@@ -19,6 +19,7 @@ public class AttachmentResponse {
     private long sizeBytes;
     private String signedUrl;
     private LocalDateTime uploadedAt;
+    private String uploaderRole;
 
     public static AttachmentResponse from(TicketAttachment attachment, String signedUrl) {
         return AttachmentResponse.builder()
@@ -28,6 +29,7 @@ public static AttachmentResponse from(TicketAttachment attachment, String signed
                 .sizeBytes(attachment.getSizeBytes())
                 .signedUrl(signedUrl)
                 .uploadedAt(attachment.getUploadedAt())
+                .uploaderRole(attachment.getUploaderRole())
                 .build();
     }
 }

src/main/java/com/ucms_backend/model/entity/TicketAttachment.java

@@ -44,6 +44,9 @@ public class TicketAttachment {
     @Column(name = "uploaded_at", nullable = false)
     private LocalDateTime uploadedAt;
 
+    @Column(name = "uploader_role", length = 20)
+    private String uploaderRole;
+
     @PrePersist
     void onPrePersist() {
         if (uploadedAt == null) {

src/main/java/com/ucms_backend/service/AttachmentService.java

@@ -90,6 +90,7 @@ public AttachmentResponse uploadAttachment(Long ticketId, MultipartFile file) {
                 .originalFilename(originalFilename)
                 .mimeType(detectedMimeType)
                 .sizeBytes(file.getSize())
+                .uploaderRole(role)
                 .build();
 
         TicketAttachment saved = ticketAttachmentRepository.save(attachment);

src/main/resources/db/migration/V14__add_uploader_role_to_attachment.sql

@@ -0,0 +1,2 @@
+            ALTER TABLE ticket_attachment
+                ADD COLUMN IF NOT EXISTS uploader_role VARCHAR(20);