Implement Robust Starknet Event Listener and Indexer

[llinsss]

Description:
Develop a reliable and fault-tolerant service within the NestJS application to listen for and index events emitted from petchain_contracts on Starknet. This should include handling missed blocks, reorgs (if applicable on Starknet's current state), and ensuring data consistency.
Consider using a dedicated Starknet RPC client library and a queuing system (e.g., RabbitMQ, Kafka) for event processing to ensure scalability and prevent data loss during spikes or service interruptions."