test: make test to work with latest identitydb

tests/persona.test.ts

@@ -12,11 +12,11 @@ describe('Persona initialization', () => {
       models: {
         factExtractor: {
           async extract(input) {
-            return {
+            return [{
               statement: 'Mina likes quiet cafes.',
               topics: [{ name: 'persona' }, { name: 'Mina' }],
               source: 'test',
-            };
+            }];
           },
         },
       },

tests/sleep-memory.test.ts

@@ -11,15 +11,15 @@ describe('sleepMemory', () => {
         factExtractor: {
           async extract(input) {
             if (input.includes('Seed:')) {
-              return { statement: 'Mina remembers stable details.', topics: [{ name: 'persona' }, { name: 'Mina' }] };
+              return [{ statement: 'Mina remembers stable details.', topics: [{ name: 'persona' }, { name: 'Mina' }] }];
             }
             expect(input).toContain('user@2026-05-01T15:00:00.000Z: 나는 타입스크립트를 2025년부터 시작했어');
             expect(input).toContain('Objectivize');
-            return {
+            return [{
               statement: 'The user started TypeScript in 2025.',
               topics: [{ name: 'user' }, { name: 'TypeScript' }, { name: '2025' }],
               confidence: 0.9,
-            };
+            }];
           },
         },
       },