aw_freeform_table() - more detail if a request fails partway through

[gilliganondata]

I got the following messages when running an aw_freeform_table() query:

Estimated runtime: 318.4sec./5.31min.
1 of 398 possible data requests complete. Starting the next 397 requests.
Request failed [429]. Retrying in 7 seconds...
A total of 1985 rows have been pulled.

There is no information about the failed request:

• What a "429" failure means
• Where in the process the failure happened (see aw_freeform_table() - provide periodic query count updates #70 — that enhancement would help with this a bit)
• Whether the retry was explicitly successful (vs. that query just got skipped?)

At a minimum, something like the following would be reassuring:

Estimated runtime: 318.4sec./5.31min.
1 of 398 possible data requests complete. Starting the next 397 requests.
Request failed [429]. Retrying in 7 seconds...
Retry successful. Continuing with additional requests...
A total of 1985 rows have been pulled.

[charlie-gallagher]

I'm not sure how much control we have over messaging, as the retrying is taken care of by httr::RETRY() (here). But in a recent update we did improve the error messaging significantly to provide better messages when things totally fail.

As long as an error is temporary, it's ok to not know what happened, right? You can mostly assume it was some server error, or temporary internet error.