rmcp-v3.5.1

Fixed

• (server) keep discover lifecycle bootstrap-neutral (#1248)
• keep handler-generated invalid params errors in-band (#1322)
• (model) export object! macro without macros feature (#1318)
• (server) default missing cache hints for 2026-07-28 peers (#1308)

Other

• [rmcp] Notify credential stores when a refresh token is rejected (#1285)