Improvement: Increase unit test coverage to 90% line + branch: `score/TimeDaemon/`

[lavrovvalera]

What

Reach 90% line coverage and 90% branch coverage for the score/TimeDaemon/
component.

Steps:

1. Generate a per-component coverage report locally:

   bazel coverage --config=time-x86_64-linux //score/TimeDaemon/...
   genhtml --branch-coverage bazel-out/_coverage/_coverage_report.dat -o coverage-report/
   

2. Identify files and branches below 90%
3. Add missing unit tests — focus areas:
   • PTPMachine — state transitions, timeout handling, error paths
   • MessageBroker — message routing, subscriber callbacks
   • VerificationMachine — validator chain execution
   • SVT validators: TimeoutValidator, TimeJumpsValidator,
     SynchronizationValidator — boundary and error conditions
   • JobRunner — concurrent Start() / Stop() paths (race condition
     regression, fixed in PR#15)

References

• S-CORE process (Coverage section):
  https://github.com/eclipse-score/score/blob/main/docs/contribute/development/cpp/code_analysis.rst
• Reusable workflow parameters:
  https://github.com/eclipse-score/cicd-workflows/blob/main/.github/workflows/cpp-coverage.yml

Estimates for realization

M - Week

Category

• Affects Detailed Design

Requirements / Architecture

• Requirements / Architecture are not affected by this change?