refactor(schema): flatten provider identity

packages/core/test/session-runner-model.test.ts

@@ -141,35 +141,6 @@ describe("SessionRunnerModel", () => {
     }),
   )
 
-  it.effect("applies a selected variant base URL", () =>
-    Effect.gen(function* () {
-      const base = model(
-        { type: "aisdk", package: "@ai-sdk/openai", url: "https://default.example/v1" },
-        [
-          {
-            id: ModelV2.VariantID.make("regional"),
-            settings: { baseURL: "https://regional.example/v1" },
-            headers: {},
-            body: {},
-          },
-        ],
-      )
-      const session = SessionV2.Info.make({
-        id: SessionV2.ID.make("ses_regional_variant"),
-        projectID: ProjectV2.ID.global,
-        title: "test",
-        model: { id: base.id, providerID: base.providerID, variant: ModelV2.VariantID.make("regional") },
-        cost: 0,
-        tokens: { input: 0, output: 0, reasoning: 0, cache: { read: 0, write: 0 } },
-        time: { created: DateTime.makeUnsafe(0), updated: DateTime.makeUnsafe(0) },
-        location: { directory: AbsolutePath.make("/project") },
-      })
-      const resolved = yield* SessionRunnerModel.resolve(session, base)
-
-      expect(resolved.route.endpoint.baseURL).toBe("https://regional.example/v1")
-    }),
-  )
-
   it.effect("overlays selected OpenAI-compatible Session variant bodies", () =>
     Effect.gen(function* () {
       const catalog = model(