Update task schema with show toggles and keywords

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/prisma/schema.prisma

@@ -53,6 +53,10 @@ model Task {
   startDate   DateTime?
   dueDate     DateTime?
   showDate    Boolean   @default(true)
+  showDescription Boolean @default(true)
+  showStatus      Boolean @default(true)
+  showIssue       Boolean @default(true)
+  keywords        String?
   creatorId   String
   assigneeId  String?
   createdAt   DateTime   @default(now())