Tier 2 Conformance: Stable Release

From https://github.com/modelcontextprotocol/rust-sdk/blob/0c13e6b271b70b2dafc0fb68c828771ae111f58f/conformance/results/2026-02-25-rust-sdk-remediation.md

# Action

Publish stable release ≥ 1.0.0

# Requirement

Stable Release

# Effort

Medium

# Where 

Cargo.toml, release process