detect simpleforce connection errors

[dosaboy]

sometimes the connection to sf gets corrupted and athena never attempts a reconnect which leave athena in a failed state and requiring a manual restart:

2023/08/23 17:34:58 [simpleforce] Failed resp.body: [{"message":"Session expired or invalid","errorCode":"INVALID_SESSION_ID"}]
2023/08/23 17:34:58 [simpleforce] HTTP GET request failed: ##redacted##
{"level":"error","msg":"Failed to upload and save report: foo - error: [simpleforce] Error. http code: 401 Error Message: Session expired or invalid Error Code: INVALID_SESSION_ID","time":"2023-08-23T17:34:58Z"}

[hillpd]

The session token will expire if there is no activity within the first half of the configured TTL:
https://salesforce.stackexchange.com/questions/335786/why-does-my-salesforce-access-token-expire-after-a-certain-time