feat: unify income payment cards and drop period comparisons (WealthLedger/main#33)

- income analytics returns only the selected period; previous/yearAgo
  comparison payloads, dependency roles and sync planning removed
- income entries now carry saved instrument logos for payment cards
- tbank grpc diagnostics distinguish queue wait, channel state and
  response headers without logging secrets

test/openapi-contract.e2e-spec.ts

@@ -77,7 +77,7 @@ describe('OpenAPI contract (integration)', () => {
     }
   });
 
-  it('exposes required semantic income dependency roles', () => {
+  it('exposes only the selected income dependency role and no comparison data', () => {
     const schemas = createOpenApiDocument(app).components?.schemas;
     expect(schemas?.IncomeAnalyticsResourceDto).toMatchObject({
       properties: {
@@ -100,9 +100,25 @@ describe('OpenAPI contract (integration)', () => {
     expect(dependency.required).toContain('role');
     expect(dependency).toMatchObject({
       properties: {
-        role: { type: 'string', enum: ['selected', 'previous', 'year'] },
+        role: { type: 'string', enum: ['selected'] },
       },
     });
+    const analytics = schemas?.IncomeAnalyticsDto;
+    assert(analytics && !('$ref' in analytics));
+    expect(analytics.required).toEqual(
+      expect.arrayContaining([
+        'accountId',
+        'period',
+        'totalsByCurrency',
+        'calculatedAt',
+        'bucketGranularity',
+        'buckets',
+        'instruments',
+        'entries',
+      ]),
+    );
+    expect(analytics.properties).not.toHaveProperty('previous');
+    expect(analytics.properties).not.toHaveProperty('yearComparison');
   });
 
   it('generates the runtime contract without server startup or deployment configuration', async () => {