Replace IRedeemer.redeem with a counter-accepting API, update callers

Fixes #121 (closed)

Created by: codecov[bot]

Codecov Report

Merging #129 into master will increase coverage by 0.22%. The diff coverage is 93.44%.

@@            Coverage Diff             @@
##           master     #129      +/-   ##
==========================================
+ Coverage   91.07%   91.29%   +0.22%     
==========================================
  Files          38       38              
  Lines        2733     2770      +37     
  Branches      351      356       +5     
==========================================
+ Hits         2489     2529      +40     
+ Misses        204      202       -2     
+ Partials       40       39       -1     

Impacted Files	Coverage Δ
src/_zkapauthorizer/tests/test_controller.py	97.51% <92.15%> (+2.33%)
src/_zkapauthorizer/controller.py	92.77% <100.00%> (ø)
src/_zkapauthorizer/tests/strategies.py	94.51% <100.00%> (+0.06%)

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