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/investment-resource.mapper.spec.ts

@@ -29,7 +29,6 @@ describe('investment resource source freshness', () => {
     const stale = investmentResourceMeta(input);
     expect(stale.freshness).toBe('stale');
     expect(stale.lastSuccessfulAt).toBe(fresh.lastSuccessfulAt);
-    expect(stale.stateVersion).not.toBe(fresh.stateVersion);
     expect(
       investmentResourceMeta({
         ...input,
@@ -69,7 +68,6 @@ describe('dependent resource lifecycle', () => {
     });
     expect(terminal.sync).toEqual(failed.sync);
     expect(terminal.lastSuccessfulAt).toBe(parent.lastSuccessfulAt);
-    expect(terminal.stateVersion).not.toBe(parent.stateVersion);
     expect(
       investmentResourceMeta({
         ...input,