refactor!: simplify runtime coordination #7

Keep financial ownership, atomic publication and refresh CAS.
Failed refresh leaves cookies untouched; logout still clears them.

Remove full-history candle prefetch and special metadata retries.
Use native Pino request context instead of parallel middleware.

BREAKING CHANGE: remove investment stateVersion, queued sync state,
and tbank-sync status progress/resources. Consumers must observe
resources through sync=observe with the updated frontend contract.

src/modules/investments/instruments/infrastructure/candle.repository.ts

@@ -53,12 +53,6 @@ export class CandleRepository {
     });
   }
 
-  coverage(uids: string[]) {
-    return this.prisma.tbankCandleCoverage.findMany({
-      where: { provider, instrumentUid: { in: uids }, interval },
-    });
-  }
-
   reserve(
     owner: { revision: string; userId: string },
     scopeKey: string,