Fix sentry initialization

[rowanseymour]

No description provided.

[codecov-commenter]

Codecov Report

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

Project coverage is 62.20%. Comparing base (fc2a5e7) to head (86773fc).

Files with missing lines	Patch %	Lines
cmd/mailroom/main.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #417      +/-   ##
==========================================
- Coverage   62.21%   62.20%   -0.01%     
==========================================
  Files         198      198              
  Lines       13941    13942       +1     
==========================================
  Hits         8673     8673              
- Misses       4353     4354       +1     
  Partials      915      915              

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