Reduce memory overhead per worker

[CodyCBakerPhD]

During recent stress testing with parallelization, workers kept causing broken processes in the pool by using too much memory, even with relatively low buffer maximums set

Here are some further optimizations to minimize the memory overhead required per worker

[codecov]

Codecov Report

Attention: Patch coverage is 80.30303% with 13 lines in your changes missing coverage. Please review.

Project coverage is 67.89%. Comparing base (0b1e03a) to head (53c5353).
Report is 4 commits behind head on main.

Files	Patch %	Lines
src/dandi_s3_log_parser/_s3_log_line_parser.py	71.42%	12 Missing ⚠️
...c/dandi_s3_log_parser/_dandi_s3_log_file_parser.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   72.37%   67.89%   -4.48%     
==========================================
  Files          11       11              
  Lines         409      408       -1     
==========================================
- Hits          296      277      -19     
- Misses        113      131      +18     

Flag	Coverage Δ
unittests	67.89% <80.30%> (-4.48%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/dandi_s3_log_parser/_s3_log_file_parser.py	100.00% <100.00%> (+2.04%)	⬆️
...c/dandi_s3_log_parser/_dandi_s3_log_file_parser.py	81.11% <87.50%> (+0.11%)	⬆️
src/dandi_s3_log_parser/_s3_log_line_parser.py	82.02% <71.42%> (-6.71%)	⬇️

... and 1 file with indirect coverage changes