fix: use patched svm crate for privileged access control

[bmuddha]

Summary by CodeRabbit

• New Features

  • Added a new development tool to the workspace.

• Bug Fixes

  • Acknowledgments are now sent only after successful writes to improve message reliability.
  • Service shutdown handling reordered to prioritize cancellation events for cleaner termination.
  • Adjusted nested-instruction account permission handling to reduce unnecessary writable access.

• Chores

  • Updated Solana-related dependencies and refined workspace configuration.

[coderabbitai]

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📝 Walkthrough

Walkthrough

This PR updates root and test-integration Cargo.toml files to use the Solana git branch bmuddha/fix/tighten-privileged-access-v3 (replacing v3), adds tools/magicblock-tui-client to workspace.members, and reforms dependency feature formatting. In runtime code, standby prioritizes shutdown earlier in tokio::select! and only acknowledges NATS block messages when block writes succeed; nested instruction program_id metas are now readonly.

Suggested reviewers

• thlorenz
• GabrielePicco
• taco-paco

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bmuddha/fix/tighten-privileged-access

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