Upgrade workspace to Move compiler v1.62.1

[SSez]

Summary

• bump all Sui dependencies to mainnet-v1.62.1
• update Move.lock files and fix deprecated APIs (vec_set, type_name, etc.)

Notes

• Verified regenerated lockfiles with Move 1.62.1 toolchain.
• No behavior change beyond API compatibility.

[SSez]

Suggestion:
coin::create_regulated_currency_v2 is kind of a legacy convenience helper. It does a lot at once (treasury cap, deny cap, metadata) inside usdc.move, which makes the setup a bit opaque.

The newer pattern is to use coin_registry::new_currency_with_otw, then call make_regulated() before finalize(). That flow registers the coin in the global registry, tracks the regulated state properly, and gives you things like global pause + better ecosystem/compliance.

Probably worth switching to the registry-based flow so this matches the current regulated currency standard and plays nicely with wallets/exchanges going forward.

[SSez]

https://docs.sui.io/standards/currency