refactor: combine evaluator table-transfer into single action

[sapinb]

Description

Fold SendTableTransferRequest into ReceiveGarblingTable so the evaluator registers its bulk-transfer expectation before sending the request to the garbler, eliminating a race where the request could arrive before local readiness was installed. Remove the now-dead SendTableTransferRequest action, TableTransferRequestAcked result, and all associated plumbing.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature/Enhancement (non-breaking change which adds functionality or enhances an existing one)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactor
• New or updated tests
• Dependency update
• Security fix

Notes to Reviewers

Checklist

• I have performed a self-review of my code.
• I have commented my code where necessary.
• I have updated the documentation if needed.
• My changes do not introduce new warnings.
• I have added tests that prove my changes are effective or that my feature works.
• New and existing tests pass with my changes.

Related Issues

closes #154