Fix #444, Adds JSC 2.1 Static Analysis comments and exposes CF_strnlen

[chillfig]

Checklist (Please check before submitting)

• [x] I reviewed the Contributing Guide.
• [x] I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Fixes #444, Adds comments in the fsw to document where static analysis warnings have been flagged and why it's ok to leave the code in its current state.

Testing performed None, only comments are added.

Expected behavior changes N/A

System(s) tested on N/A

Additional context Depends on https://github.com/nasa/osal/pull/1465

Third party code N/A

Contributor Info - All information REQUIRED for consideration of pull request Justin Figueroa, Vantage Systems

[dzbaker]

CCB 27 June 2024: Will re-run workflows once osal#1465 is merged in to verify they pass.