Fix invalid literals in activities cache

[twiggler]

match_id is a string, not an integer

Closes #1358

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.74%. Comparing base (40cca25) to head (a633d8c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1502   +/-   ##
=======================================
  Coverage   80.74%   80.74%           
=======================================
  Files         394      394           
  Lines       34614    34614           
=======================================
  Hits        27948    27948           
  Misses       6666     6666           

Flag	Coverage Δ
unittests	80.74% <ø> (ø)

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[codspeed-hq]

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing activities-cache-invalid-literal (a633d8c) with main (40cca25)}

Summary

✅ 11 untouched benchmarks

[Miauwkeru]

Also verified in the SQL schema [MatchId] is indeed a TEXT field.