fix(investments): align roles and date contracts

Identify income dependencies by role and document screen-specific dates.
Convert inclusive calendar days into half-open source ranges while
preserving operation timestamps and existing stored coverage.

src/modules/investments/tbank-sync/tbank-screen.spec.ts

@@ -62,4 +62,13 @@ describe('manual sync screen boundary', () => {
       }),
     ).toThrow();
   });
+  it('keeps independently supplied event dates and rejects an end before the default UTC start', () => {
+    for (const range of [{ from: '2096-02-29' }, { to: '2096-02-29' }]) {
+      const scope = { screen: 'events' as const, accountId: 'all', ...range };
+      expect(normalizeScreen(scope)).toEqual(scope);
+    }
+    expect(() =>
+      normalizeScreen({ screen: 'events', accountId: 'all', to: '2000-01-01' }),
+    ).toThrow();
+  });
 });