refactor(mps): Input validation checks in APFProcessor for max size

[tim-shockley]

AB#6610

PR Checklist

• Unit Tests have been added for new changes
• API tests have been updated if applicable
• All commented code has been removed
• If you've added a dependency, you've ensured license is compatible with Apache 2.0 and clearly outlined the added dependency.

What are you changing?

Anything the reviewer should know when reviewing this PR?

If the there are associated PRs in other repositories, please link them here (i.e. open-amt-cloud-toolkit/repo#365 )

[codecov]

Codecov Report

Merging #597 (807a7f7) into main (18aa98d) will increase coverage by 0.09%.
The diff coverage is 100.00%.

❗ Current head 807a7f7 differs from pull request most recent head b5c0360. Consider uploading reports for the commit b5c0360 to get more accurate results

@@            Coverage Diff             @@
##             main     #597      +/-   ##
==========================================
+ Coverage   91.47%   91.56%   +0.09%     
==========================================
  Files          68       68              
  Lines        2990     3000      +10     
  Branches      472      482      +10     
==========================================
+ Hits         2735     2747      +12     
+ Misses        255      253       -2     

Impacted Files	Coverage Δ
src/amt/APFProcessor.ts	99.72% <100.00%> (+0.56%)	⬆️

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