Implement chunked transfer

[midenotch]

PULL REQUEST TEMPLATE

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TITLE:

Implement chunked transfer for large snapshot arrays - Issue #995

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DESCRIPTION:
Implemented rewind support by adding SimulationContext::rollback_to(...) in context.rs and extending the host wrapper in runner.rs. In this checkout the host wrapper lives in runner.rs, so that’s the file I updated instead of the ticket’s host.rs.

Overview

Rollback now rebuilds a fresh Soroban Host from the snapshot’s ledger entries, truncates the context’s event history to the snapshot boundary, and resets host-side events so execution can continue deterministically from that point. I also exported the new modules from lib.rs.

Verification

Verified with:

cargo check --lib
cargo test --lib rollback_to_restores_exact_snapshot_and_truncates_future_events -- --nocapture
cargo test --lib test_restore_from_snapshot_replaces_mutated_storage_and_clears_host_events -- --nocapture

Related Issues

Closes #995

Type of Change

• New feature
• Bug fix
• Breaking change
• Documentation update

Checklist

• Code follows project style guidelines
• Self-review completed
• Tests added/updated
• Documentation updated
• No new linting issues
• Changes verified locally

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[midenotch]

Done, Close: #1048

[dotandev]

resolve ci and conflicts.

[midenotch]

resolve ci and conflicts.

Done