chore: optimise config backend revisionId calls

[cisse21]

Description

PrizePicks CFD

• Reduce the number of config backend API calls being made for a single revisionId
• VACUUM FULL notifier table if the size exceeds 5GB

Linear Ticket

Fixes PIPE-1583

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 73.04%. Comparing base (f835aa7) to head (03fecd7).
Report is 11 commits behind head on master.

Files with missing lines	Patch %	Lines
services/notifier/repo.go	44.44%	3 Missing and 2 partials ⚠️
warehouse/internal/loadfiles/loadfiles.go	60.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5139      +/-   ##
==========================================
- Coverage   73.11%   73.04%   -0.07%     
==========================================
  Files         437      438       +1     
  Lines       50789    50907     +118     
==========================================
+ Hits        37134    37185      +51     
- Misses      11228    11292      +64     
- Partials     2427     2430       +3     

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