fix(self-inspect): declare jsonSerializable on agent-flagged RPCs

[JianJroh]

Description

#301 introduced the agent => jsonSerializable: true contract but missed the 5 agent-flagged RPCs in packages/self-inspect, breaking pnpm play at registration with DF0019 error.

Additional context

devtools/devframe/packages/devframe/src/rpc/collector.ts

Lines 100 to 101 in 72cfb9d

	if (fn.agent && fn.jsonSerializable !== true)
	throw logger.DF0019({ name: fn.name }).throw()

[pkg-pr-new]

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npm i https://pkg.pr.new/@vitejs/devtools@311

npm i https://pkg.pr.new/@vitejs/devtools-kit@311

npm i https://pkg.pr.new/@vitejs/devtools-rolldown@311

npm i https://pkg.pr.new/@vitejs/devtools-self-inspect@311

commit: 72cfb9d