activation_sequence

`activate` is synchronous and non-blocking in main.ts; it never awaits startup work so the UI is available as soon as possible. It runs the following phases:
1. Register reference inlay-hint and CodeLens configuration / commands synchronously.
2. Call analytical_submodule_activation — registers commands, activity bar, chat, webviews, AI commands, and mutation hooks synchronously and returns without starting indexing.
3. Register import-error quick-fix commands when the analytical submodule registered.
4. Arm first_paint_startup so index startup cannot race the activity-bar shell.
5. Invoke onboarding_check without awaiting it, so onboarding cannot block activation.
Submodule failures are logged and do not prevent later phases from running.

Interactive page: activation_sequence