fix(protocol): fix workflow errors in #13293

[davidtaikocha]

• fix a tRelBp calculation error
• fix a getProofReward parameter(provenAt) error in tests (new Date().getMilliseconds() => new Date().getTime())
• fix an occasional error in blockFee.test.ts (blockFee is not promised to be increased in the test, especially the first comparison: expect(initFee).to.be.lt.(feeAfterFirstProposal) )

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (fix_config@3551770). Click here to learn what that means.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             fix_config   #13296   +/-   ##
=============================================
  Coverage              ?   59.85%           
=============================================
  Files                 ?      118           
  Lines                 ?     3380           
  Branches              ?      494           
=============================================
  Hits                  ?     2023           
  Misses                ?     1273           
  Partials              ?       84           

Flag	Coverage Δ		*Carryforward flag
bridge-ui	94.28% <0.00%> (?)		Carriedforward from 6e68094
protocol	51.43% <0.00%> (?)
relayer	64.71% <0.00%> (?)		Carriedforward from 6e68094
ui	100.00% <0.00%> (?)		Carriedforward from 6e68094

*This pull request uses carry forward flags. Click here to find out more.

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