release: v0.2.1

[github-actions]

🤖 New release

• rustapi-macros: 0.2.0 -> 0.2.1
• rustapi-openapi: 0.2.0 -> 0.2.1
• rustapi-validate: 0.2.0 -> 0.2.1
• rustapi-core: 0.2.0 -> 0.2.1
• rustapi-extras: 0.2.0 -> 0.2.1
• rustapi-grpc: 0.2.0 -> 0.2.1
• rustapi-mcp: 0.2.0 -> 0.2.1
• rustapi-toon: 0.2.0 -> 0.2.1
• rustapi-view: 0.2.0 -> 0.2.1
• rustapi-ws: 0.2.0 -> 0.2.1
• rustapi-rs: 0.2.0 -> 0.2.1
• rustapi-testing: 0.2.0 -> 0.2.1
• cargo-rustapi: 0.2.0 -> 0.2.1

Changelog

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This PR was generated with release-plz.

[Tuntii]

Opened automatically after we restored Actions write permissions (release-plz was 403'ing).

This would publish 0.2.1 of every workspace crate to crates.io. Changelog body is empty because the commits since 0.2.0 are mostly docs/CI/security lockfile. Do not merge until we decide 0.2.1 is a real release (h2 advisory + MCP README + lint fix may be enough, but it should have notes).