FMWK-788 Improved bandwidth limiter

[filkeith]

New limiter implementation

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 70.78652% with 26 lines in your changes missing coverage. Please review.

Project coverage is 79.92%. Comparing base (6303221) to head (3f09e64).

Files with missing lines	Patch %	Lines
internal/bandwidth/limiter.go	20.00%	8 Missing ⚠️
client.go	25.00%	4 Missing and 2 partials ⚠️
handler_backup.go	33.33%	3 Missing and 1 partial ⚠️
handler_restore.go	60.00%	3 Missing and 1 partial ⚠️
internal/bandwidth/bucket.go	94.44%	2 Missing and 1 partial ⚠️
pipe/chains.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #315      +/-   ##
==========================================
+ Coverage   79.89%   79.92%   +0.02%     
==========================================
  Files          95       96       +1     
  Lines        9562     9619      +57     
==========================================
+ Hits         7640     7688      +48     
- Misses       1478     1489      +11     
+ Partials      444      442       -2     

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