test(memory): rename qwen25Coder32B test to qwen36

Matches commit 8d0a959 model flip — extractor default is now
ModelID.qwen36 ("qwen3.6:latest"). The previous test name + assertion
were stale and failed on `swift test --package-path packages/Memory`
with the "Optional(qwen3.6:latest)) is not equal to (qwen2.5-coder…)"
diff. No production code change.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/Memory/Tests/MemoryTests/MemoryExtractorTests.swift

@@ -207,7 +207,7 @@ final class MemoryExtractorTests: XCTestCase {
         }
     }
 
-    func testExtractorUsesQwen25Coder32B() async throws {
+    func testExtractorUsesQwen36() async throws {
         let mock = MockLLMProvider()
         mock.scriptedEvents = [.messageStop]
 
@@ -215,7 +215,7 @@ final class MemoryExtractorTests: XCTestCase {
         _ = try await extractor.extract(
             userText: "u", assistantText: "a", priorActiveFacts: []
         )
-        XCTAssertEqual(mock.capturedModel, ModelID.qwen25coder32b)
+        XCTAssertEqual(mock.capturedModel, ModelID.qwen36)
     }
 
     func testExtractorCallsToolChoiceAuto() async throws {