MOD: clock use lottery manner

[coderfengyun]

Use lottery to implement clockin

Type of change

• [x] New Feature (non-breaking change which adds functionality)
• [x] This change requires a storage migration
• [x] This change requires a benchmark

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] New and existing benchmarks pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

[codecov-commenter]

Codecov Report

Merging #70 (108fe28) into main (f0f627e) will increase coverage by 0.03%. The diff coverage is 38.46%.

:exclamation: Current head 108fe28 differs from pull request most recent head ba784e1. Consider uploading reports for the commit ba784e1 to get more accurate results

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
+ Coverage   42.53%   42.56%   +0.03%     
==========================================
  Files          37       37              
  Lines        2671     2655      -16     
==========================================
- Hits         1136     1130       -6     
+ Misses       1535     1525      -10     

Impacted Files	Coverage Δ
pallets/clockin/src/lib.rs	49.56% <36.84%> (+1.47%)	:arrow_up:
pallets/nft/src/lib.rs	42.19% <100.00%> (ø)

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