Rename the `InstanceStore` module to `InstanceRuntime` across all consumer
sites to better reflect its role as a runtime lifecycle manager rather than
a persistence layer. Update the kilo-gateway route dependency key from
`InstanceStore` to `Instances` for clarity.
Additional changes:
- Replace `Schema.Number` with `Schema.Finite` for `recommendedIndex` in
both the provider and models schemas
- Inject `InstanceStore.Service` into the ProviderAuth layer and use its
`disposeAll()` method instead of escaping to a raw promise
- Remove obsolete `getBootstrapRunEffect` usage from indexing startup tests
- Add missing `warnings` method to the test config fixture