fix log parsing for internal events

[d4mr]

PR-Codex overview

This PR enhances the getTransactionLogs function by modifying how contract addresses are handled and event signatures are resolved. It collects all relevant contract addresses from the transaction receipt and retrieves event signatures from each contract asynchronously.

Detailed summary

• Replaced single contract variable with a Set called contracts to store unique contract addresses.
• Added a loop to include addresses from transactionReceipt.logs.
• Changed event signature retrieval to handle multiple contracts asynchronously.
• Combined event signatures from all contracts into a single array.
• Updated the mapping of event signatures to use combinedEventSignatures.

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