Log traceback when exception is raised

[oliverjwroberts]

Description of change

#987 added exception logging to some functions, however, it was deemed more useful to also log the traceback when an exception occurs.

This PR adds such functionality. It also fixes a bug introduced in the aforementioned PR, that references the variable response in an except block, where it is out of scope.

Test instructions

You should now see the traceback logged when an exception occurs during the sending of requests to Data Hub.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 68.68%. Comparing base (0d95a15) to head (9c5e372).

Files	Patch %	Lines
app/enquiries/common/datahub_utils.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #999   +/-   ##
=======================================
  Coverage   68.68%   68.68%           
=======================================
  Files          61       61           
  Lines        2034     2034           
=======================================
  Hits         1397     1397           
  Misses        637      637           

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