fix(runtime-host): advance compatibility epoch for the continuity schema bump

Generated-by: maka

Author: me2seeks

packages/runtime-host/src/protocol/index.ts

@@ -91,7 +91,11 @@ export const RUNTIME_HOST_REGISTRATION_SCHEMA_VERSION = 1 as const;
 export const RUNTIME_HOST_PROTOCOL_VERSION = 0 as const;
 // Increment when the same protocol version no longer guarantees safe Client-Host
 // interoperability. Mismatches are rejected before domain commands are admitted.
-export const RUNTIME_HOST_COMPATIBILITY_EPOCH = 48 as const;
+export const RUNTIME_HOST_COMPATIBILITY_EPOCH = 49 as const;
+// 49: Session continuity snapshots advance to schema 5 with the durable
+// steering message echo. Older peers reject the unknown schemaVersion at
+// admission, so mixed peers must fail the handshake before either side
+// renders a steering message.
 // 48: Session branch creation accepts an explicit Side Conversation intent.
 // Older peers reject the strict input shape or cannot apply its snapshot semantics.
 // 47: Project registration can carry an explicit location preference. Epoch-46