ftplib error on successful carbon run

[ghukill]

A recent PR indicated that even successful runs of Carbon may log some errors related to the FTP file upload. Here is an example of those logs:

2023-09-20T14:35:18.299-04:00 | 2023-09-20 18:35:18,299 INFO carbon.cli.main(): Logger 'root' configured with level=INFO
-- | --
  | 2023-09-20T14:35:18.299-04:00 | 2023-09-20 18:35:18,299 INFO carbon.cli.main(): Carbon config settings loaded for environment: stage
  | 2023-09-20T14:35:18.692-04:00 | 2023-09-20 18:35:18,692 INFO carbon.database.run_connection_test(): Testing connection to the Data Warehouse
  | 2023-09-20T14:35:19.438-04:00 | 2023-09-20 18:35:19,438 INFO carbon.database.run_connection_test(): Successfully connected to the Data Warehouse: 10.2.0.5.0
  | 2023-09-20T14:35:19.477-04:00 | 2023-09-20 18:35:19,477 INFO carbon.app.run_connection_test(): Testing connection to the Symplectic Elements FTP server
  | 2023-09-20T14:35:19.578-04:00 | 2023-09-20 18:35:19,578 INFO carbon.app.run_connection_test(): Successfully connected to the Symplectic Elements FTP server
  | 2023-09-20T14:35:19.579-04:00 | 2023-09-20 18:35:19,579 INFO carbon.cli.main(): Carbon run has started.
  | 2023-09-20T14:35:43.851-04:00 | 2023-09-20 18:35:43,851 INFO carbon.app.write(): The feed has collected 19461 'people' records
  | 2023-09-20T14:35:43.852-04:00 | Exception in thread Thread-1:
  | 2023-09-20T14:35:43.852-04:00 | Traceback (most recent call last):
  | 2023-09-20T14:35:43.852-04:00 | File "/usr/local/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
  | 2023-09-20T14:35:43.854-04:00 | self.run()
  | 2023-09-20T14:35:43.854-04:00 | File "/usr/local/lib/python3.11/threading.py", line 975, in run
  | 2023-09-20T14:35:43.855-04:00 | self._target(*self._args, **self._kwargs)
  | 2023-09-20T14:35:43.855-04:00 | File "/carbon/app.py", line 167, in __call__
  | 2023-09-20T14:35:43.856-04:00 | ftps.storbinary(cmd=f"STOR {self.path}", fp=self.content_feed)
  | 2023-09-20T14:35:43.856-04:00 | File "/carbon/app.py", line 67, in storbinary
  | 2023-09-20T14:35:43.856-04:00 | return self.voidresp()
  | 2023-09-20T14:35:43.856-04:00 | ^^^^^^^^^^^^^^^
  | 2023-09-20T14:35:43.856-04:00 | File "/usr/local/lib/python3.11/ftplib.py", line 259, in voidresp
  | 2023-09-20T14:35:43.856-04:00 | resp = self.getresp()
  | 2023-09-20T14:35:43.856-04:00 | ^^^^^^^^^^^^^^
  | 2023-09-20T14:35:43.856-04:00 | File "/usr/local/lib/python3.11/ftplib.py", line 252, in getresp
  | 2023-09-20T14:35:43.856-04:00 | raise error_temp(resp)
  | 2023-09-20T14:35:43.856-04:00 | ftplib.error_temp: 425 Error while transfering data: ECONNABORTED - Connection aborted
  | 2023-09-20T14:35:43.857-04:00 | 2023-09-20 18:35:43,857 INFO carbon.cli.main(): Carbon run has successfully completed.

Given that the upload is successful, it doesn't feel urgent to address this, but creating this issue to follow-up on these intermittent (?) errors.