Add ScyllaDB as a Transaction Storage

[kobayurii]

This pull request introduces ScyllaDB as a new transaction storage backend. It integrates ScyllaDB to store and retrieve transaction data, providing an alternative to existing storage solutions.

Key Changes

1. Added connection setup and configuration for ScyllaDB.
2. Implemented methods for storing, querying, and managing transaction data.

This PR lays the groundwork for incorporating ScyllaDB into the system and may require subsequent optimizations based on production workloads.

[kobayurii]

@race-of-sloths please, include my PR in the Race

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