Three small fixes for stale references after the recent
adapter→route rename and `model.protocol` field removal in
@opencode-ai/llm:
- Update three `@opencode-ai/llm/adapter` imports to `/route`.
- Switch `NATIVE_PROTOCOLS` filter on `model.protocol` to
`NATIVE_ROUTES` on `model.route`.
- Refresh test fixtures: `protocol:` → `route:`, drop `apiKey:`
/ `adapter:` assertions that reference fields no longer on
`ModelRef`, drop the `attachments` expectation that no longer
has a source-side handler.
- Default `key: "test-key"` on `ProviderTest.info` so prepare()
can resolve auth without per-test env setup.
Kit Langton
454e08792a