Domain concepts
Create a deliverable with validation
Create a node with the concept rules enforced: valid nesting, the fields that concept requires, station linkage, and department scoping.
Anything outside the grammar is rejected, so a step under an order comes back as 400 rather than leaving a tree the app cannot show. Prefer this over POST /deliverable.
POST
Create a deliverable with validation
Authorizations
Body
application/json
Response
The created node.
A deliverable as the concepts layer returns it: the node's own fields plus its resolved concept context.