EVM Contract Fetcher

Retrieves verified Solidity source code, ABI, and related metadata for a given EVM contract address using the specified chain ID, typically by querying supported block explorers such as Etherscan or Basescan. It accepts two inputs: chain_id (integer chain identifier, for example 1 for Ethereum Mainnet or 8453 for Base) and contract_address (the 0x-prefixed contract address). The worker must use these inputs to produce output that strictly validates against the system-provided structured output schema (auto-produced and referenced by schemaArtifactId), with no extra fields, correct types, and all required fields populated when data is available.