chore(solver/svm): robust svm markfilled

[corverroos]

Make SVM Markfilled logic more robust:

• Idempotent, so can always retry
• Ensure markfilled in DidFill as well as Fill

issue: none

[corverroos]

This pull request introduces enhancements to the SVM order processing logic in the solver package, focusing on improving order status handling and ensuring proper synchronization between outbox and inbox states. The key changes include adding a new method to check if an order has been filled and enhancing the markFilledSVMOrder function to validate the order's status before marking it as filled.

Enhancements to order processing:

• Added DidFill method to procDeps: Introduced a new DidFill method in svmProcDeps to check if an order is already filled in the outbox and ensure it is marked as filled in the inbox for synchronization. This method leverages the trusted SVM state to prevent redundant processing. (solver/app/svmproc.go, solver/app/svmproc.goR72-R99)

• Improved order status validation in markFilledSVMOrder: Enhanced the markFilledSVMOrder function to include a status check using anchorinbox.GetOrderState. This ensures the order is only marked as filled if it is in a pending state, avoiding unnecessary operations for already processed orders. (solver/app/svmtypes.go, solver/app/svmtypes.goR159-R170)