FLOW-15 Unfinished TODOs

[nialexsan]

File(s) affected: cadence/contracts/connectors/evm/ERC4626SwapConnectors.cdc ,
cadence/contracts/connectors/evm/ERC4626SinkConnectors.cdc
Description: Several TODO comments remain in the codebase indicating incomplete implementations:

1. ERC4626SwapConnectors.cdc:204 - "Impl detail - accept quote that was just used by swap() but reverse the direction..."
2. ERC4626SinkConnectors.cdc:72 - "Update EVMTokenConnector.Sink to return 0.0 if it doesn't have fees to pay..."
3. ERC4626SinkConnectors.cdc:92 - "pass from through and skip the intermediary withdrawal"
4. ERC4626SinkConnectors.cdc:118 - "consider more graceful handling of this error"
5. ERC4626SinkConnectors.cdc:131 - "Consider unwinding the deposit & returning to the from vault"
   Recommendation: Address or explicitly defer all TODOs before production deployment.