187 respect custom namespace setting for typed models

[Sevitas]

Motivation

Fixes #187

Checklist

• [x] Code follows coding conventions held in this repo
• [x] Automated tests have been added
• [x] Tests are passing
• [x] Docs have been updated (if applicable)
• [x] Temporary settings (e.g. variables used during development and testing) have been reverted to defaults

How to test

Test repro steps in related bug

[codecov[bot]]

Codecov Report

Merging #188 (6c39a6a) into master (6a65eb4) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #188   +/-   ##
=======================================
  Coverage   94.68%   94.68%           
=======================================
  Files          35       35           
  Lines        1280     1280           
  Branches      130      130           
=======================================
  Hits         1212     1212           
  Misses         46       46           
  Partials       22       22           

Impacted Files	Coverage Δ
...delGenerator.Core/ExtendedDeliveryCodeGenerator.cs	92.30% <100.00%> (ø)

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