Set up CI check workflows #41

What

Establish and harden the CI check workflows for the Time module — covering code quality gates (clang-tidy, sanitizers, formatting, static analysis policies) and CI supply-chain security (pinned workflow references).

Scope

• Adopt score_cpp_policies as the central quality tooling baseline
• Add a Clang-Tidy CI check workflow
• Add sanitizer CI check workflows (ASAN / TSAN / UBSAN)
• Migrate C++ formatting to score_format_checker (replacing score_bazel_tools_cc)
• Pin all reusable eclipse-score/cicd-workflows references to a commit SHA (reproducibility and supply-chain hardening)