Call multiple contracts with optional Sweep-on-Failure

[yrong]

Summary

Adds optional sweep support to the CallContracts command so that when sub-calls fail, configured tokens (including ETH) can be swept to a recipient. This recovers assets that would otherwise be stuck in the agent when a call reverts.

Behavior

• CallContracts: Runs sub-calls in order and reverts on the first failure.
• Sweep on failure: When configured, a sweep runs in the catch block after a failure to move the agent’s ETH and/or ERC20s to a recipient.
• Payload format: CallContractsParams bundles calls, sweepRecipient, and tokensToSweep.

[codecov]

Codecov Report

❌ Patch coverage is 83.78378% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.14%. Comparing base (1832f1a) to head (6beeda5).

Files with missing lines	Patch %	Lines
contracts/src/AgentExecutor.sol	75.00%	3 Missing and 1 partial ⚠️
contracts/src/Gateway.sol	80.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1702      +/-   ##
==========================================
+ Coverage   81.04%   81.14%   +0.09%     
==========================================
  Files          22       22              
  Lines         997     1034      +37     
  Branches      186      195       +9     
==========================================
+ Hits          808      839      +31     
- Misses        172      177       +5     
- Partials       17       18       +1     

Flag	Coverage Δ
solidity	81.14% <83.78%> (+0.09%)	⬆️

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