feat: mirror delivered outbound messages (#1031)

Co-authored-by: T Savo <TSavo@users.noreply.github.com>

src/gateway/protocol/schema/cron.ts

@@ -55,6 +55,8 @@ export const CronPayloadSchema = Type.Union([
 export const CronIsolationSchema = Type.Object(
   {
     postToMainPrefix: Type.Optional(Type.String()),
+    postToMainMode: Type.Optional(Type.Union([Type.Literal("summary"), Type.Literal("full")])),
+    postToMainMaxChars: Type.Optional(Type.Integer({ minimum: 0 })),
   },
   { additionalProperties: false },
 );