Failed transfer reported as success when file was deleted before transfer completed

[pnuu]

Describe the bug
If there's a delay in processing the request made by the Client (for example due to scp timeouts) and the file-to-be-transferred is deleted by Trollmoves Server before this, the transfer is still reported as success.

To Reproduce
Delete a file that is being transferred, I guess.

Expected behavior
No message is sent, if the original file isn't available and the transfer fails.

Actual results

[2023-01-25 12:56:25,109 DEBUG    trollmoves.server] We have a match: /data/eumetcast/hvs-1/E1H-TPG-2/IMG_DK01B01_202301251249_010.bz2
...
[2023-01-25 12:56:25,352 DEBUG    trollmoves.server] Bunzipped /data/eumetcast/hvs-1/E1H-TPG-2/IMG_DK01B01_202301251249_010.bz2 to /tmp/himawari/IMG_DK01B01_202301251249_010
...
[2023-01-25 12:56:25,608 DEBUG    trollmoves.server] Scheduling /tmp/himawari/IMG_DK01B01_202301251249_010 for removal in 30s
...
[2023-01-25 12:56:54,654 DEBUG    trollmoves.server] Received a request
...
[2023-01-25 12:56:55,610 DEBUG    trollmoves.server] Removed /tmp/himawari/IMG_DK01B01_202301251249_010.
...
[2023-01-25 12:57:01,962 ERROR    trollmoves.movers] No such file or directory. File not transfered: /tmp/himawari/IMG_DK01B01_202301251249_010. Original error message: [Errno 2] No such file or directory: '/tmp/himawari/IMG_DK01B01_202301251249_010'
[2023-01-25 12:57:01,962 DEBUG    paramiko.transport] [chan 49] EOF sent (49)
[2023-01-25 12:57:01,963 INFO     trollmoves.movers] Successfully copied /tmp/himawari/IMG_DK01B01_202301251249_010 to scp://host/path/

... followed by a Posttroll file message about the successful transfer. This message is then propagated until the missing file is causing a crash in Trollflow2/Satpy.

Screenshots

Environment Info:

• OS: Linux
• Trollmoves Version: 0.10.0

Additional context