Merge model build and rebuild

[NicolaCourtier]

Description

Refactor BaseModel so that rebuilding the model uses the same build functionality as building from scratch.

Issue reference

Fixes #444

Review

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• Updated the CHANGELOG.md in reverse chronological order (newest at the top) with a concise description of the changes, including the PR number.
• Noted any breaking changes, including details on how it might impact existing functionality.

Type of change

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.67%. Comparing base (d68a70d) to head (b7dac83).
Report is 495 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #451      +/-   ##
===========================================
+ Coverage    98.51%   98.67%   +0.16%     
===========================================
  Files           46       46              
  Lines         2960     2941      -19     
===========================================
- Hits          2916     2902      -14     
+ Misses          44       39       -5     

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[BradyPlanden]

Looks like a nice refactor, thanks @NicolaCourtier. A few suggestions for you to consider.