Add zod schemas for `workflowDag`/`workflowDagSimple`

[nf-s]

csdr-cloud-spatial-app/packages/schemas/src/crud.ts

Lines 49 to 50 in e5af8f0

	workflowDag: z.any().nullable(),
	workflowDagSimple: z.any().nullable(),

We should add zod schemas for workflowDag/workflowDagSimple - as this will ensure that valid objects are passed into the DB, and also provide type safety in the frontend

[nf-s]

I'll do this as part of

• Finish design changes, and add chart component library #106

[willjnz]

Thanks for resolving this @nf-s