fix(v031): ImportService.test buildExportNote helper 에 Cut E frontmatter 5 필드 추가

Cut E v0.3.0 에서 ExportNote interface 에 status / statusChangedAt / moveReason /
dueDate / dueDateEditedByUser 필드 추가했지만 ImportService.test 의 buildExportNote
helper 갱신 누락 → composeFrontmatter 가 undefined moveReason 로 formatScalar 호출
시 null !== undefined 분기 통과 후 .includes throw.

helper 에 5 필드 default (active / null / null / null / false) 추가. 회귀 fix.

tests/unit/ImportService.test.ts

@@ -34,6 +34,12 @@ function buildExportNote(overrides: Partial<ExportNote> = {}): ExportNote {
     aiGeneratedAt: '2026-04-25T14:23:34.000Z',
     userIntent: null,
     intentPromptedAt: null,
+    // v0.3.0 Cut E — frontmatter round-trip 5 필드 (Cut B status + Cut C dueDate).
+    status: 'active',
+    statusChangedAt: null,
+    moveReason: null,
+    dueDate: null,
+    dueDateEditedByUser: false,
     tags: [{ name: 'pr', source: 'ai' }],
     media: [],
     ...overrides