451 switch sa interface to be more like an api

[Donnie-Ice]

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Exploring this as a possible improvement. Is this functionality needed/wanted?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 67.34694% with 16 lines in your changes missing coverage. Please review.

Project coverage is 82.24%. Comparing base (14ee573) to head (91dd7c2).
Report is 236 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/sa/internal/sa_interface_inmemory.template.c	68.42%	10 Missing and 2 partials ⚠️
src/core/crypto_tc.c	20.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #452      +/-   ##
==========================================
+ Coverage   75.97%   82.24%   +6.26%     
==========================================
  Files          81       39      -42     
  Lines       22263    11950   -10313     
  Branches     1807      978     -829     
==========================================
- Hits        16914     9828    -7086     
+ Misses       4707     1746    -2961     
+ Partials      642      376     -266     

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