fix(tests): prevent telemetry module from leaking fetch calls across test files

The telemetry test enables telemetry globally by deleting BUN_ENV/NODE_ENV
and calling initTelemetry(). Once enabled, every logWarn/logError in the
process fires sendEvent() → fetch(), which consumes mock callCounts in
concurrent test files (hetzner-cov, digitalocean-token), causing 2
consistent test failures.

Add _testHelpers.enabled to telemetry.ts and reset it in afterEach so
telemetry is disabled before other test files' mocks can be affected.

Agent: test-engineer
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

packages/cli/src/__tests__/telemetry.test.ts

@@ -13,6 +13,7 @@
 import { afterEach, beforeEach, describe, expect, it, mock } from "bun:test";
 import { isString } from "@openrouter/spawn-shared";
 import * as v from "valibot";
+import { _testHelpers as telemetryTestHelpers } from "../shared/telemetry.js";
 
 // ── Schemas for validating PostHog payloads ─────────────────────────────────
 
@@ -127,6 +128,10 @@ describe("telemetry", () => {
 
   afterEach(() => {
     global.fetch = originalFetch;
+    // Disable telemetry so fire-and-forget fetch calls don't leak into other
+    // test files running in the same process (the root cause of flaky
+    // hetzner-cov and digitalocean-token test failures).
+    telemetryTestHelpers.enabled = false;
     if (originalTelemetry !== undefined) {
       process.env.SPAWN_TELEMETRY = originalTelemetry;
     } else {

packages/cli/src/shared/telemetry.ts

@@ -270,3 +270,15 @@ function sendEvent(event: string, properties: Record<string, unknown>): void {
     }),
   );
 }
+
+// ── Test Helpers ──────────────────────────────────────────────────────────────
+
+/** Exposed for test cleanup — prevents telemetry from leaking across test files. */
+export const _testHelpers = {
+  get enabled(): boolean {
+    return _enabled;
+  },
+  set enabled(val: boolean) {
+    _enabled = val;
+  },
+};