chore: release v0.16.0

[github-actions]

🤖 New release

• rmcp-macros: 0.15.0 -> 0.16.0
• rmcp: 0.15.0 -> 0.16.0 (⚠ API breaking changes)

⚠ rmcp breaking changes

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field AuthorizationMetadata.code_challenge_methods_supported in /tmp/.tmp9NX0f7/rust-sdk/crates/rmcp/src/transport/auth.rs:261
  field StoredCredentials.granted_scopes in /tmp/.tmp9NX0f7/rust-sdk/crates/rmcp/src/transport/auth.rs:27
  field StoredCredentials.granted_scopes in /tmp/.tmp9NX0f7/rust-sdk/crates/rmcp/src/transport/auth.rs:27

--- failure enum_variant_added: enum variant added on exhaustive enum ---

Description:
A publicly-visible enum without #[non_exhaustive] has a new variant.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#enum-variant-new
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/enum_variant_added.ron

Failed in:
  variant StreamableHttpError:InsufficientScope in /tmp/.tmp9NX0f7/rust-sdk/crates/rmcp/src/transport/streamable_http_client.rs:78
  variant AuthError:InsufficientScope in /tmp/.tmp9NX0f7/rust-sdk/crates/rmcp/src/transport/auth.rs:245
  variant AuthError:InsufficientScope in /tmp/.tmp9NX0f7/rust-sdk/crates/rmcp/src/transport/auth.rs:245

Changelog

rmcp-macros

0.16.0 - 2026-02-12

Other

• add rudof-mcp to MCP servers list (#645)

rmcp

0.16.0 - 2026-02-12

Other

• remove unused axum dependency from server-side-http feature (#642)
• 11-25-2025 compliant Auth (#651)
• add rudof-mcp to MCP servers list (#645)

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