Fix #8, do not update LastFalseToTrue + LastTrueToFalse when transitioning from STALE

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• 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 LC Sets the TtoFValue when it transitions from STALE to FALSE #8
  • removes || (PreviousResult == LC_WATCH_STALE) to avoid entering the update block if transitioning from FALSE (so we only enter the block when WPEvalResult == ...TRUE)
  • updates the relevant tests and adds test logic to confirm this behavior in future (and catch if the bug is re-introduced)

Testing performed
GitHub CI actions all passing successfully (incl. Build + Run, Unit/Functional Tests etc.).
100% coverage is maintained.

Expected behavior changes
As above.

System(s) tested on
Debian 12 using the current main branch of cFS bundle.

Contributor Info
Avi Weiss   @thnkslprpt