Add chunk size to thermo

[munrojm]

Adds chunk size as an explicit input parameter to thermo to ensure proper serialization.

[codecov-commenter]

Codecov Report

Merging #508 (a61f3a1) into main (35fa1b4) will increase coverage by 21.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main     #508       +/-   ##
===========================================
+ Coverage   76.53%   97.54%   +21.01%     
===========================================
  Files          65      116       +51     
  Lines        3699    24120    +20421     
===========================================
+ Hits         2831    23529    +20698     
+ Misses        868      591      -277     

Impacted Files	Coverage Δ
emmet-core/emmet/core/qchem/task.py	96.96% <0.00%> (ø)
...met-builders/emmet/builders/vasp/task_validator.py	67.56% <0.00%> (ø)
...met-core/emmet/core/qchem/calc_types/calc_types.py	100.00% <0.00%> (ø)
emmet-builders/emmet/builders/settings.py	100.00% <0.00%> (ø)
...et-builders/emmet/builders/materials/elasticity.py	81.62% <0.00%> (ø)
emmet-builders/emmet/builders/materials/summary.py	96.42% <0.00%> (ø)
emmet-core/emmet/core/xrd.py	93.61% <0.00%> (ø)
emmet-core/emmet/core/vasp/material.py	96.42% <0.00%> (ø)
emmet-builders/emmet/builders/vasp/materials.py	95.38% <0.00%> (ø)
emmet-builders/emmet/builders/molecules/atomic.py	98.78% <0.00%> (ø)
... and 56 more

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[acrutt]

@munrojm I think you may also need to add chunk_size=chunk_size, to line 96 in order to make sure the set chunk_size gets passed through. Otherwise the chunk_size is added as an attribute, but remains set at the default value even if a custom chunk_size is set.