chore: publish crates to crates.io

[yeongseon]

Summary

Publish the 4 workspace crates to crates.io in dependency order:

1. cubrid-protocol
2. cubrid-client
3. cubrid-tokio
4. cubrid-pool

Prerequisites

• crates.io API token configured (cargo login)
• Verify each crate's Cargo.toml metadata (description, license, repository, keywords, categories)

Steps

cargo publish -p cubrid-protocol
# wait for crates.io index update
cargo publish -p cubrid-client
cargo publish -p cubrid-tokio
cargo publish -p cubrid-pool

Why

• sea-orm-cubrid depends on cubrid-tokio and cubrid-protocol from crates.io
• cubrid-cookbook Rust examples reference these crates from crates.io
• Both are currently blocked until these crates are published