(Debugging WIP) add debugging logs

[KeranYang]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 51.51515% with 16 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@0a803d7). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...main/java/io/numaproj/numaflow/sinker/Service.java	60.00%	7 Missing and 1 partial ⚠️
.../main/java/io/numaproj/numaflow/sinker/Server.java	45.45%	6 Missing ⚠️
...ava/io/numaproj/numaflow/sinker/SinkerTestKit.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #150   +/-   ##
=======================================
  Coverage        ?   60.45%           
  Complexity      ?      392           
=======================================
  Files           ?      126           
  Lines           ?     2789           
  Branches        ?      195           
=======================================
  Hits            ?     1686           
  Misses          ?      967           
  Partials        ?      136           

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