refactor: delete the compatibility config surface

packages/cli/test/compatibility.test.ts

@@ -1,17 +0,0 @@
-import { expect, test } from "bun:test";
-import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
-import { tmpdir } from "node:os";
-import { join } from "node:path";
-import { compatibilityReport, upgradeCompatibility } from "../src/compatibility-command.ts";
-
-test("compatibility upgrade is backed up, current, and idempotent", async () => {
-  const root = mkdtempSync(join(tmpdir(), "wrnexus-compatibility-"));
-  const file = join(root, "wrnexus.config.ts");
-  writeFileSync(file, `export default { port: 3000 };\n`);
-  const first = upgradeCompatibility(root);
-  expect(first.changed).toBe(true);
-  expect(readFileSync(first.backup, "utf8")).toContain("port: 3000");
-  expect(readFileSync(file, "utf8")).toContain('compatibilityDate: "2026-08-02"');
-  expect(upgradeCompatibility(root).changed).toBe(false);
-  expect((await compatibilityReport(root)).needsUpgrade).toBe(false);
-});

packages/cli/test/create.test.ts

@@ -96,7 +96,6 @@ test("scaffoldApp includes the complete v0.8 configuration and starter structure
       "imports:",
       "types:",
       "stores:",
-      "compatibility:",
       "performance:",
       "observability:",
       "tenancy:",