Upgrades for name token and registrar.

[zie1ony]

This pull request introduces several important updates across the codebase, focusing on upgrading dependencies, adding a new upgrade scenario for the Registrar contract, improving timestamp handling, and refining contract logic. The most notable changes are summarized below.

Dependency and Toolchain Upgrades:

• Upgraded all odra workspace dependencies from version 2.4.0 to 2.8.1 in Cargo.toml, ensuring compatibility with the latest features and fixes.
• Updated the Rust toolchain to use nightly-2026-01-01 instead of nightly-2025-01-01.

New Scenario & CLI Enhancements:

• Added a new UpgradeRegistrar scenario to the CLI, allowing the Registrar contract to be upgraded via the command line. This includes implementing the scenario logic and registering it in the CLI entrypoint. [1] [2] [3]

Contract Logic Improvements:

• Improved the timestamp handling in the Registrar contract by introducing a utility function trim_microseconds_to_milliseconds_if_needed, which prevents bugs caused by off-chain systems supplying timestamps in microseconds instead of milliseconds. This function is now used in the expiration check, and unit tests have been added for it. [1] [2] [3]
• Simplified the NameToken contract's transfer logic by using raw_transfer instead of manually fetching the owner and calling raw_transfer_from.

Deployment Script Adjustments:

• Updated deployment scripts to pass an additional None parameter to load_or_deploy_with_cfg calls for all contract components, aligning with updated API requirements. [1] [2] [3] [4] [5]

These changes collectively enhance contract upgradability, improve robustness against off-chain integration issues, and keep the project up to date with the latest dependencies and toolchain.