refactor parquet extractor backfill support function

[yuunlimm]

this will reduce some potential duplicate codes from parquet migration

Test Plan

[yuunlimm]

• refactor parquet extractor backfill support function #613 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 34.5%. Comparing base (e3795ed) to head (be7a2e0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...dk-processor/src/utils/parquet_extractor_helper.rs	0.0%	5 Missing ⚠️
...uet_default_processor/parquet_default_extractor.rs	0.0%	1 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (e3795ed) and HEAD (be7a2e0). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (e3795ed)	HEAD (be7a2e0)
	2	1

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #613      +/-   ##
========================================
- Coverage   48.6%   34.5%   -14.1%     
========================================
  Files        186     186              
  Lines      24911   24904       -7     
========================================
- Hits       12129    8616    -3513     
- Misses     12782   16288    +3506     

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