Fix batchgetitem bug (#53)

[jterry64]

• adding xray for lambda monitoring (#51)

• send batch_get_items requests in chunks of 100 items

• constant for dynamodb get_batch_items request limit

• new line.. missed linter/pre-commit:/

• add unit test for get_batch_items calls; fix edge case caught by test

[codecov[bot]]

Codecov Report

Merging #55 (614590f) into master (cffb583) will increase coverage by 0.11%. The diff coverage is 86.36%.

@@            Coverage Diff             @@
##           master      #55      +/-   ##
==========================================
+ Coverage   91.57%   91.69%   +0.11%     
==========================================
  Files          20       20              
  Lines        1140     1156      +16     
==========================================
+ Hits         1044     1060      +16     
  Misses         96       96              

Flag	Coverage Δ
unittests	91.69% <86.36%> (+0.11%)	:arrow_up:

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

Impacted Files	Coverage Δ
raster_analysis/results_store.py	94.05% <78.57%> (+0.51%)	:arrow_up:
raster_analysis/globals.py	100.00% <100.00%> (ø)
tests/e2e/test_raster_analysis.py	100.00% <100.00%> (ø)

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