chore(lint): reduce warning debt across core adapters and model clients

src/memory/hybrid-search.test.ts

@@ -1,6 +1,5 @@
-import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { describe, it, expect, vi } from 'vitest';
 import { HybridSearch } from './hybrid-search.js';
-import type { HybridSearchResult } from './hybrid-search.js';
 import type { MemoryStore, SearchResult } from './store.js';
 import type { VectorStore, VectorSearchResult } from './vector-store.js';
 import type { EmbeddingProvider } from './embeddings.js';
@@ -153,7 +152,10 @@ describe('HybridSearch', () => {
       const keywordResult = results.find((r) => r.source === 'keyword');
       expect(vectorResult).toBeDefined();
       expect(keywordResult).toBeDefined();
-      expect(vectorResult!.score).toBeGreaterThan(keywordResult!.score);
+      if (!vectorResult || !keywordResult) {
+        throw new Error('Expected both vector and keyword results');
+      }
+      expect(vectorResult.score).toBeGreaterThan(keywordResult.score);
     });
 
     it('falls back to keyword search when vector search fails', async () => {