feat: re-calculate epoch reward after halving

[zmcNotafraid]

Magickbase/ckb-explorer-public-issues#487

[codecov-commenter]

Codecov Report

Attention: 187 lines in your changes are missing coverage. Please review.

Comparison is base (bb447e4) 66.37% compared to head (70ecfef) 67.30%.
Report is 145 commits behind head on develop.

❗ Current head 70ecfef differs from pull request most recent head fbca1e8. Consider uploading reports for the commit fbca1e8 to get more accurate results

Files	Patch %	Lines
...ib/tasks/migration/update_output_cells_status.rake	29.26%	29 Missing ⚠️
lib/tasks/migration/generate_referring_cells.rake	19.23%	21 Missing ⚠️
.../controllers/api/v1/ckb_transactions_controller.rb	39.28%	17 Missing ⚠️
app/workers/token_transfer_detect_worker.rb	10.52%	17 Missing ⚠️
...ib/tasks/migration/async_missing_transactions.rake	15.78%	16 Missing ⚠️
app/workers/contract_statistic_worker.rb	0.00%	15 Missing ⚠️
app/models/ckb_sync/new_node_data_processor.rb	71.73%	13 Missing ⚠️
app/controllers/api/v2/scripts_controller.rb	72.97%	10 Missing ⚠️
lib/websocket.rb	0.00%	10 Missing ⚠️
lib/scheduler.rb	0.00%	7 Missing ⚠️
... and 9 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1509      +/-   ##
===========================================
+ Coverage    66.37%   67.30%   +0.93%     
===========================================
  Files          275      283       +8     
  Lines         7397     7635     +238     
===========================================
+ Hits          4910     5139     +229     
- Misses        2487     2496       +9     

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