test: fix import ordering in promotion.test (biome organizer)

The mock-completeness comment + `import * as realEmbedding` were placed
before ./constants; biome's import organizer (bun run lint = biome check .)
requires local imports sorted, so CI's Check(plugin) lint went red. Reorder
so ./embedding sits after ./constants. Behavior unchanged.

Author: ualtinok

packages/plugin/src/features/magic-context/memory/promotion.test.ts

@@ -3,6 +3,7 @@
 import { afterEach, beforeEach, describe, expect, it, mock, spyOn } from "bun:test";
 import { Database } from "../../../shared/sqlite";
 import { closeQuietly } from "../../../shared/sqlite-helpers";
+import { CATEGORY_DEFAULT_TTL } from "./constants";
 // The real module is imported (and evaluated) here BEFORE the mock registers,
 // so it captures every real export. Bun's mock.module is process-global and
 // persists across files in one test run, so a PARTIAL mock leaks into sibling
@@ -11,7 +12,6 @@ import { closeQuietly } from "../../../shared/sqlite-helpers";
 // found" under a whole-dir run). Spreading the real module keeps the mock
 // complete — only the three functions this file needs stubbed are overridden.
 import * as realEmbedding from "./embedding";
-import { CATEGORY_DEFAULT_TTL } from "./constants";
 import { computeNormalizedHash } from "./normalize-hash";
 
 const mockEmbedText = mock(async () => null);