chore: release v3.4.0

[github-actions]

🤖 New release

• rmcp-macros: 3.3.0 -> 3.4.0
• rmcp: 3.3.0 -> 3.4.0

Changelog

rmcp-macros

3.4.0 - 2026-09-14

Added

• (model) add ServerConfig and ClientConfig (#1266)

Fixed

• (model) deprecate ServerInfo and ClientInfo aliases (#1156)

rmcp

3.4.0 - 2026-09-14

Added

• (model) add ServerConfig and ClientConfig (#1266)

Fixed

• (rmcp) route peer cancellation by lifecycle (#1262)
• run first pre-init request in service loop (#1263)
• (auth) let url origin decide prm discovery (#1264)
• (model) deprecate ServerInfo and ClientInfo aliases (#1156)
• (auth) ignore non-metadata JSON when probing for protected resource metadata (#1204)
• do not treat malformed JSON 200 as Accepted for requests (#1208)
• (streamable-http-server) map handler-generated HeaderMismatch to HTTP 400 (#1259)
• (http) enforce Origin validation semantics (#1192)

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