feat: implement enhanced transaction history retrieval

[jpuri]

Explanation

This PR implements enhanced transaction history retrieval for the IncomingTransactionHelper. When the enhanced_history_retrieval feature flag is enabled and WebSocket is connected, incoming transactions are fetched via event-driven updates instead of polling, reducing unnecessary API calls and improving responsiveness.

References

Ref: https://github.com/MetaMask/MetaMask-planning/issues/6682

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them