[castler]

Summary

Fixes all cppcoreguidelines-special-member-functions clang-tidy findings (3 findings across 3 files).

Approach

Explicitly declares the missing copy/move special member functions (deleted, since none of these classes support meaningful copy/move semantics) so each class fully follows the Rule of Five instead of relying on implicit generation, per the C++ Core Guidelines' recommendation that if any of destructor/copy/move is user-declared, all five should be declared.

Fixes

• sample_sender_receiver.cpp: TestDestructor is a scope-guard type that calls stop_source_.request_stop() in its destructor; it is only ever used as a named local variable and was never intended to be copied or moved. Deleted copy/move constructor and assignment.
• provider.cpp (partial_restart/provider_restart): CyclicEventSender already explicitly deleted its copy constructor/assignment (its std::thread member isn't copyable) but didn't declare move operations. Since its background thread captures this, moving the object would leave the thread referencing a stale instance, so move is deleted too, for the same reason copy already was.
• smokeyeyes.cpp: SharedState owns a pthread_barrier_t that is placed directly into shared memory via placement-new and destroyed in its destructor; the barrier is tied to this object's address, so copying or moving it is not meaningful. Deleted copy/move constructor and assignment.

All changes are pure declarations (= delete) with no behavioral change, since none of these types were ever copied or moved elsewhere in the codebase.

Verification

• Scoped clang-tidy build isolated to cppcoreguidelines-special-member-functions shows 0 findings (down from 3 across 3 files).
• Full bazel build //score/mw/com/test/common_test_resources/... //score/mw/com/test/partial_restart/... //score/mw/com/test/smokeyeyes/... passes.
• bazel test //score/mw/com/test/partial_restart/provider_restart/integration_test:provider_restart_graceful passes.
• bazel test //:format_test_C++_with_clang-format passes.

Scope

This PR intentionally contains only cppcoreguidelines-special-member-functions fixes, per the project convention of one clang-tidy check per PR (see #995, #999, #1000, #1001, #1003, #1012, #1013, #1014).