Bug fixes and additional warnings from first attempt at mapping Dengue data

[pipliggins]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 70.73171% with 24 lines in your changes missing coverage. Please review.

Project coverage is 96.92%. Comparing base (2830531) to head (9300fc2).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
fhirflat/resources/medicationadministration.py	50.00%	8 Missing ⚠️
fhirflat/resources/medicationstatement.py	57.14%	6 Missing ⚠️
fhirflat/util.py	71.42%	6 Missing ⚠️
fhirflat/flat2fhir.py	0.00%	2 Missing ⚠️
fhirflat/ingest.py	85.71%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #72      +/-   ##
==========================================
- Coverage   97.70%   96.92%   -0.78%     
==========================================
  Files          42       44       +2     
  Lines        2047     2276     +229     
==========================================
+ Hits         2000     2206     +206     
- Misses         47       70      +23     

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