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

Filter non-RUB data at ingest and collapse per-currency collections
into a single RUB Money. Drop currency from TbankPortfolioValuePoint,
remove NON_RUB_ACTIVITY and the screener currency filter.

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

prisma/migrations/20261108000000_rub_only_value_points/migration.sql

@@ -0,0 +1,32 @@
+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_TbankPortfolioValuePoint" (
+    "userId" TEXT NOT NULL,
+    "accountId" TEXT NOT NULL,
+    "attemptId" TEXT NOT NULL,
+    "value" TEXT NOT NULL,
+    "capturedAt" DATETIME NOT NULL,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    PRIMARY KEY ("userId", "accountId", "attemptId"),
+    CONSTRAINT "TbankPortfolioValuePoint_userId_accountId_fkey" FOREIGN KEY ("userId", "accountId") REFERENCES "TbankPortfolioValueHistory" ("userId", "accountId") ON DELETE CASCADE ON UPDATE RESTRICT
+);
+-- RUB-only: keep the RUB row per key; non-RUB rows are dropped.
+INSERT INTO "new_TbankPortfolioValuePoint" ("accountId", "attemptId", "capturedAt", "createdAt", "userId", "value")
+SELECT "accountId", "attemptId", "capturedAt", "createdAt", "userId", "value"
+FROM "TbankPortfolioValuePoint"
+WHERE "currency" = 'RUB';
+DROP TABLE "TbankPortfolioValuePoint";
+ALTER TABLE "new_TbankPortfolioValuePoint" RENAME TO "TbankPortfolioValuePoint";
+CREATE INDEX "TbankPortfolioValuePoint_userId_accountId_capturedAt_idx" ON "TbankPortfolioValuePoint"("userId", "accountId", "capturedAt");
+
+-- RUB-only: persisted JSON payloads written in the old multi-currency shape
+-- are stale. A missing snapshot/forecast is the app's normal "not synced yet"
+-- state: reads report availability 'missing' and the hourly walk rebuilds them
+-- on the next pass. Delete the stale rows instead of failing reads with 500.
+DELETE FROM "TbankPortfolio";
+DELETE FROM "TbankForecast";
+
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;

prisma/migrations/20261108000001_rub_only_resync_now/migration.sql

@@ -0,0 +1,3 @@
+-- RUB-only: snapshots were dropped by the previous migration; clearing the hourly
+-- schedule makes the next scheduler tick rebuild them instead of waiting for the term.
+DELETE FROM "TbankSyncWork" WHERE "scopeKey" = 'hourly';

prisma/schema.prisma

@@ -101,18 +101,17 @@ model TbankPortfolioValueHistory {
   @@id([userId, accountId])
 }
 
-// One row per currency of a fully valued successful portfolio attempt.
+// One row per fully valued successful portfolio attempt (RUB only).
 model TbankPortfolioValuePoint {
   userId String
   accountId String
   attemptId String
-  currency String
   value String
   capturedAt DateTime
   createdAt DateTime @default(now())
   history TbankPortfolioValueHistory @relation(fields: [userId, accountId], references: [userId, accountId], onDelete: Cascade, onUpdate: Restrict)
 
-  @@id([userId, accountId, attemptId, currency])
+  @@id([userId, accountId, attemptId])
   @@index([userId, accountId, capturedAt])
 }