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.

test/online-upstream.ts

@@ -62,12 +62,12 @@ export function failUpstream(rpc: jest.Mock, kind: 'bond' | 'share', code: numbe
     uid: 'e6123145-9665-43e0-8413-cd61b8aa9b13',
   };
   const healthy = new Map<string, unknown>([
-    ['bondBy', { instrument }],
+    ['bondBy', { instrument: { ...instrument, currency: 'rub' } }],
     ['findInstrument', { instruments: [instrument] }],
     ['getAssetBy', { asset: { description: 'description' } }],
     ['getAssetFundamentals', { fundamentals: [] }],
     ['getLastPrices', { lastPrices: [] }],
-    ['shareBy', { instrument }],
+    ['shareBy', { instrument: { ...instrument, currency: 'rub' } }],
   ]);
   const failure = Object.assign(new Error('grpc failure'), {
     code,