Post-extension session-model retry now covers the case where the initial restore failed entirely (e.g. saved default unavailable, last active role supplied by an extension) and the settings default filled in the active model. Also recomputes thinking-level from full precedence against the reclaimed model so a fallback model's defaultLevel does not become sticky.\n\nFixes #1649
Initial startup resume runs before extension providers register, so a role model supplied by an extension fell back to the saved default. Retry the preferred session-model candidates once provider registrations are processed and re-resolve thinking level for the new model.\n\nFixes #1649
- Refactored logger.time() API to accept function references and arguments separately instead of wrapped callbacks.
- Replaced RingBuffer-based timing with wall-clock markers and async span tracking for improved timing accuracy.
- Updated 20+ call sites across executor, kernel, main, and tools modules to use new logger.time() signature.
- Removed parsePath() helper function and inlined path.split() calls in settings module.
- Added test case verifying model selection without auth validation during startup.
- Fixes deferred `--model` resolution to match extension-provided models before fallback
- Fixes CLI `--api-key` handling to support deferred model selection
- Adds OAuth provider support for extensions with source-scoped registration cleanup
- Adds custom API registration helpers with built-in collision checks
- Expands `Api` type to support extension-defined identifiers
- Adds tests for runtime provider registration and model selection
