fix: ensure allocations are available if the adapter never makes any connections

[bdraco]

Allocations would not return anything if the adapter had never made any connections

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.86%. Comparing base (1312bf7) to head (efffce9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
+ Coverage   83.84%   83.86%   +0.01%     
==========================================
  Files          12       12              
  Lines        1201     1202       +1     
  Branches      139      139              
==========================================
+ Hits         1007     1008       +1     
  Misses        145      145              
  Partials       49       49              

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[codspeed-hq]

CodSpeed Performance Report

Merging #131 will not alter performance

_{Comparing missing_allocations (efffce9) with main (1312bf7)}

Summary

✅ 3 untouched benchmarks