feat: add ticket comments attachments and export

backend/apps/tickets/schemas.py

@@ -50,3 +50,35 @@ class TicketEventOut(Schema):
     to_value: dict
     remark: str
     created_at: datetime
+
+
+class TicketCommentIn(Schema):
+    content: str
+    comment_type: str = "user"
+    visibility: str = "internal"
+
+
+class TicketCommentOut(Schema):
+    id: int
+    content: str
+    comment_type: str
+    visibility: str
+    created_at: datetime
+
+
+class TicketAttachmentIn(Schema):
+    file_name: str
+    file_type: str = ""
+    mime_type: str = ""
+    file_size: int = 0
+    storage_path: str
+
+
+class TicketAttachmentOut(Schema):
+    id: int
+    file_name: str
+    file_type: str
+    mime_type: str
+    file_size: int
+    storage_path: str
+    created_at: datetime