Replace legacy global BackendRegistry with bootstrap context adapter that
maintains backward compatibility while delegating to explicit context.
Changes:
- Create BOOTSTRAP_CONTEXT: OnceLock<Arc<Mutex<RegistrationContext>>>
- register_backend(): delegates to bootstrap context
- is_backend_registered(): reads from bootstrap context
- registered_backends(): reads from bootstrap context
- build_rig(): reads from bootstrap context
Result: Plugins continue calling global functions, but all operations
now route through the bootstrap context instead of a separate global
registry. This completes the de-globalization while maintaining full
backward compatibility with existing plugins.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>
sjgandClaude Haiku 4.5
d7f5dc83f8