add cdbg data product

[damonmcc]

related to #1348

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.36%. Comparing base (13366ee) to head (5514820).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1355      +/-   ##
==========================================
+ Coverage   70.07%   70.36%   +0.29%     
==========================================
  Files         115      114       -1     
  Lines        6145     5966     -179     
  Branches      706      693      -13     
==========================================
- Hits         4306     4198     -108     
+ Misses       1692     1622      -70     
+ Partials      147      146       -1     

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[fvankrieken]

Just noting that some block groups have 0 population - for these, should percentages be 0 (as reported in the source data) or null?

[damonmcc]

@fvankrieken

Just noting that some block groups have 0 population - for these, should percentages be 0 (as reported in the source data) or null?

when I hit "divide by 0" issues, I went with 0 as the result for now since I didn't wanna have to handle nulls yet

this made the final eligibility queries simpler and allows a not_null test in product models (started with those just as sanity checks)

but I could see why we might wanna use nulls to be less misleading