fix: only select match rules where the account ID matches

[morremeyer]

This fixes an issue where if there are match rules with an identical matcher in multiple budgets, the match rule from the wrong budget could be used by the mapping process on import.

This was caused by a missing clause in the SQL statement that led to match rules being considered multiple times.

With this fix, the processing of match rules is also significatly faster now, since a match rule is only considered once.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.54%. Comparing base (8c275f4) to head (7c7bf04).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1233      +/-   ##
==========================================
- Coverage   79.54%   79.54%   -0.01%     
==========================================
  Files          57       57              
  Lines        3828     3827       -1     
==========================================
- Hits         3045     3044       -1     
  Misses        638      638              
  Partials      145      145              

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