[execution-layer] - Clean up adapter inconsistencies and align naming across chains

[Txrmarcos]

Audit Base adapters (AerodromeAdapterV2) vs Avalanche adapters (TraderJoeAdapter, BenqiLendAdapter, SAVAXAdapter). Ensure consistent function signatures, error handling, and return types. Normalize protocol IDs, token address resolution, and ABI patterns. Document current contract addresses and roles in CONTRACTS.md.