fix: scope income and ledger sync to requested intervals (WealthLedger/backend#57)

test/tbank-income-local.e2e-spec.ts

@@ -297,6 +297,58 @@ describe('local income completeness and exact money (SQLite)', () => {
     expect(result.data?.calculatedAt).toBe('2025-02-01T00:00:00.000Z');
     expect(upstream.getOperationsByCursor).not.toHaveBeenCalled();
   });
+  it('ordinary covered income reads local data without membership or operations RPC', async () => {
+    await prisma.tbankConnection.update({
+      where: { userId: 'income-owner' },
+      data: { membershipAt: new Date('2020-01-01Z') },
+    });
+    const response = await get('a', undefined, false).expect(200);
+    const result = response.body as IncomeAnalyticsResourceDto;
+    expect(result.data).not.toBeNull();
+    expect(result.meta.completeness).toBe('complete');
+    expect(upstream.getOpenAccounts).not.toHaveBeenCalled();
+    expect(upstream.getOperationsByCursor).not.toHaveBeenCalled();
+  });
+  it('cold income imports only the missing requested interval', async () => {
+    await prisma.tbankConnection.update({
+      where: { userId: 'income-owner' },
+      data: { membershipAt: new Date('2020-01-01Z') },
+    });
+    let release: () => void = () => {
+      throw new Error('Upstream not initialized');
+    };
+    const blocked = new Promise<{ hasNext: boolean; items: never[] }>((resolve) => {
+      release = () => resolve({ hasNext: false, items: [] });
+    });
+    upstream.getOperationsByCursor.mockReturnValue(blocked);
+    const first = await get('a', 'from=2025-02-01&to=2025-02-28', false).expect(200);
+    const cold = first.body as IncomeAnalyticsResourceDto;
+    release();
+    expect(cold.data).toBeNull();
+    expect(cold.meta.completeness).toBe('incomplete');
+    let result: IncomeAnalyticsResourceDto = cold;
+    for (let attempt = 0; attempt < 100; attempt++) {
+      const response = await get('a', 'from=2025-02-01&to=2025-02-28').expect(200);
+      result = response.body as IncomeAnalyticsResourceDto;
+      if (result.meta.completeness === 'complete') break;
+      await new Promise((resolve) => setTimeout(resolve, 10));
+    }
+    expect(result.data).not.toBeNull();
+    expect(result.meta.completeness).toBe('complete');
+    expect(upstream.getOpenAccounts).not.toHaveBeenCalled();
+    expect(upstream.getOperationsByCursor.mock.calls).toEqual([
+      ['synthetic', expect.objectContaining({
+        accountId: 'a',
+        from: { seconds: '1738357199' },
+        to: { seconds: '1738368001' },
+      })],
+      ['synthetic', expect.objectContaining({
+        accountId: 'a',
+        from: { seconds: '1738367999' },
+        to: { seconds: '1740776401' },
+      })],
+    ]);
+  });
   it('returns while a cold upstream is blocked and validates access/period before scheduling', async () => {
     await get('absent', undefined, false).expect(404);
     await get('a', 'from=2025-02-31&to=2025-03-01', false).expect(400);