refactor!: support RUB only (WealthLedger/main#55) (#204)

BREAKING CHANGE: per-currency API fields replaced with single RUB Money.

test/tbank-portfolio-publish.e2e-spec.ts

@@ -16,18 +16,15 @@ describe('portfolio publication (SQLite)', () => {
   const snapshot = {
     lastSuccessfulAt: '2026-01-01T00:00:00.000Z',
     isStale: false,
-    totalsByCurrency: [],
+    totals: { currency: 'RUB', value: '0' },
     positions: [],
-    cashBalances: [],
-    structure: { currencies: [], unvaluedCategories: [] },
+    cash: { currency: 'RUB', value: '0' },
+    structure: { totalValue: '0', hasNegativeValues: false, categories: [], unvaluedCategories: [] },
   } satisfies PortfolioDto;
   const accountId = 'account';
   const valuedSnapshot = {
     ...snapshot,
-    totalsByCurrency: [
-      { currency: 'RUB', value: '200' },
-      { currency: 'USD', value: '10' },
-    ],
+    totals: { currency: 'RUB', value: '200' },
   } satisfies PortfolioDto;
   const createRunningAttempt = () =>
     prisma.tbankSyncWork.create({
@@ -95,7 +92,7 @@ describe('portfolio publication (SQLite)', () => {
     expect(await prisma.tbankPortfolio.count()).toBe(1);
   });
 
-  it('rolls back the snapshot, first value point and claim when the second point fails', async () => {
+  it('rolls back the snapshot, value point and claim when the point write fails', async () => {
     const previousFetchedAt = new Date('2025-12-31T00:00:00.000Z');
     const previousCapturedAt = new Date('2025-12-31T01:00:00.000Z');
     await prisma.tbankPortfolio.create({
@@ -114,7 +111,6 @@ describe('portfolio publication (SQLite)', () => {
         points: {
           create: {
             attemptId: 'previous-attempt',
-            currency: 'RUB',
             value: '100',
             capturedAt: previousCapturedAt,
           },
@@ -123,11 +119,9 @@ describe('portfolio publication (SQLite)', () => {
     });
     await createRunningAttempt();
     interceptTransaction((tx) => {
-      const upsert = tx.tbankPortfolioValuePoint.upsert.bind(tx.tbankPortfolioValuePoint);
       jest
         .spyOn(tx.tbankPortfolioValuePoint, 'upsert')
-        .mockImplementationOnce((args) => upsert(args))
-        .mockRejectedValueOnce(new Error('injected second point failure'));
+        .mockRejectedValueOnce(new Error('injected point failure'));
     });
 
     await expect(
@@ -136,7 +130,7 @@ describe('portfolio publication (SQLite)', () => {
         accountId,
         valuedSnapshot,
       ),
-    ).rejects.toThrow('injected second point failure');
+    ).rejects.toThrow('injected point failure');
 
     expect(
       await prisma.tbankPortfolio.findUnique({