Add hierarchical accumulation

[hkctkuy]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 97.29730% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 62.42%. Comparing base (f8ff34b) to head (7e5ceea).

❗ Current head 7e5ceea differs from pull request most recent head 889f8ce. Consider uploading reports for the commit 889f8ce to get more accurate results

Files	Patch %	Lines
casr/src/bin/casr-cluster.rs	96.15%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #202      +/-   ##
==========================================
+ Coverage   62.28%   62.42%   +0.13%     
==========================================
  Files          32       32              
  Lines        5279     5293      +14     
==========================================
+ Hits         3288     3304      +16     
+ Misses       1991     1989       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.