Add file attachment functionality for equipment management

- Introduced DTO for file attachments with metadata (objectKey, originalFileName, contentType, sizeBytes, downloadUrl).
- Updated Equipment DTO to include an optional attachment field.
- Implemented endpoints for uploading and deleting equipment attachments.
- Enhanced Equipment service to handle file storage and retrieval using S3.
- Updated EquipmentEdit, EquipmentList, and EquipmentShow components to support file attachment input and display.
- Configured S3 settings in docker-compose and environment files.

server/prisma/schema.prisma

@@ -20,6 +20,8 @@ model Equipment {
   dateOfInspection       DateTime?
   commissionedAt         DateTime?
   status                 EquipmentStatus         @default(Active)
+  /// JSON: { objectKey, originalFileName, contentType, sizeBytes } — файл в MinIO/S3
+  attachment             Json?
   changeEquipmentStatuses ChangeEquipmentStatus[]
 }