WIP: snapchain migration

[aditiharini]

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PR-Codex overview

This PR introduces a new PruneMessages RPC method and associated request/response structures, enhancing message management capabilities. It also implements caching and message pruning functionalities across various components, improving performance and data consistency.

Detailed summary

• Added PruneMessagesRequest and PruneMessagesResponse messages in protobufs/schemas/request_response.proto.
• Implemented PruneMessages RPC method in protobufs/schemas/rpc.proto.
• Introduced clearCachedMessageCount and clearStorageCacheForFid methods in apps/hubble/src/storage/stores/storeEventHandler.ts.
• Updated packages/shuttle/src/shuttle/index.ts to export migration-related functionalities.
• Enhanced StorageCache with clearMessageCount method for cache management.
• Modified L2EventsProvider to support a stopping block for event syncing.
• Implemented message reconciliation improvements in packages/shuttle/src/shuttle/messageReconciliation.ts.
• Created migration logic for processing on-chain events and username proofs in packages/shuttle/src/shuttle/migration.ts.
• Added logging enhancements for better visibility during message processing.
• Updated apps/hubble/src/rpc/adminServer.ts to handle new RPC methods and logging.

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Name	Status	Preview	Comments	Updated (UTC)
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Latest commit: 8b1d4a2

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