Add payment history for probability calculation in path finding

[chenyukang]

1. Record payment history
2. Add probability calculation based on payment history

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 37.43017% with 112 lines in your changes missing coverage. Please review.

Project coverage is 40.50%. Comparing base (58fa34e) to head (1e4498f).

Files with missing lines	Patch %	Lines
src/fiber/graph.rs	10.00%	72 Missing ⚠️
src/fiber/history.rs	73.07%	21 Missing ⚠️
src/fiber/network.rs	9.52%	19 Missing ⚠️

Additional details and impacted files

@@                        Coverage Diff                         @@
##           yukang-more-on-payment-session     #228      +/-   ##
==================================================================
- Coverage                           40.51%   40.50%   -0.02%     
==================================================================
  Files                                  51       52       +1     
  Lines                               37370    37532     +162     
==================================================================
+ Hits                                15141    15201      +60     
- Misses                              22229    22331     +102     

Flag	Coverage Δ
unittests	40.50% <37.43%> (-0.02%)	⬇️

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