Remove logger dependency on libccf

[Copilot]

Closes #7596.

logger.h pulled in get_current_thread_id() from libccf.a, creating an implicit circular dependency for libraries such as ccfcrypto that are themselves dependencies of ccf.

• Thread ID ownership

  • Moved thread ID state and helpers into src/threading/thread_ids.cpp, compiled into ccfcrypto, so logger users share a single implementation without linking libccf.
  • Preserved existing APIs: get_current_thread_id(), set_current_thread_id(), and reset_thread_id_generator().

• Build graph cleanup

  • Removed src/enclave/thread_local.cpp.
  • Removed CMake references that explicitly compiled thread_local.cpp into tests, benchmarks, and tools.
  • Removed the app linker workaround forcing get_current_thread_id resolution from ccf.

• Coverage

  • Added a focused logger unit test for thread ID assignment, reset, and per-thread initialization.

[achamayou]

@copilot that feels like it's going to lead to duplicated symbols, especially if applications include logger.h too.

[Copilot]

@copilot that feels like it's going to lead to duplicated symbols, especially if applications include logger.h too.

Moved the thread ID implementation back out of the header and into a single object compiled into ccfcrypto, so logger.h no longer owns inline state while still avoiding the libccf dependency. Addressed in aca4c8b.