chore(server): add logging to the email transporter

[iainsproat]

Description & motivation

Changes:

To-do before merge:

• test to validate how noisy this will be

Screenshots:

Validation of changes:

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.

References

[codecov]

Codecov Report

Attention: Patch coverage is 14.28571% with 6 lines in your changes missing coverage. Please review.

Project coverage is 71.64%. Comparing base (e663b85) to head (631754f).
Report is 1532 commits behind head on main.

Files with missing lines	Patch %	Lines
...ackages/server/modules/emails/utils/transporter.ts	14.28%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4218      +/-   ##
==========================================
- Coverage   71.66%   71.64%   -0.03%     
==========================================
  Files         424      424              
  Lines       19042    19049       +7     
  Branches     3072     3072              
==========================================
+ Hits        13646    13647       +1     
- Misses       4365     4371       +6     
  Partials     1031     1031              

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