chore: have processor dropped stats to include only source info and not destination

[Sidddddarth]

Description

Have processor dropped stats to include only source info and not destination.

Linear Ticket

retl Ticket comment

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a2e0b10) 71.95% compared to head (b6624b8) 71.90%.

❗ Current head b6624b8 differs from pull request most recent head dd4eff9. Consider uploading reports for the commit dd4eff9 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4087      +/-   ##
==========================================
- Coverage   71.95%   71.90%   -0.05%     
==========================================
  Files         372      372              
  Lines       54831    54850      +19     
==========================================
- Hits        39453    39442      -11     
- Misses      13061    13095      +34     
+ Partials     2317     2313       -4     

Files	Coverage Δ
processor/processor.go	89.07% <100.00%> (+0.01%)	⬆️
services/rsources/stats_collector.go	91.16% <100.00%> (+0.85%)	⬆️

... and 15 files with indirect coverage changes

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[cisse21]

Any benefit of doing ParseBytes instead of unmarshaling?

[atzoum]

it is iterating over the field tokens, so we can gain some iterations as soon as we are done with the fields we are interested in (performance benefit)