idea: read-only Itô rental preview/planner against the canonical CLI

Archived from the unpushed July-23 branch codex/ito-demo-rental-handoff (superseded-by-design; patch preserved in the owner's workstream-results archive).

Idea worth keeping: a rental preview — normalize the user's self-host/training requirements (accelerator, model, budget) into a truthful, no-quote, no-mutation preview before handing off to the canonical compute flow. The archived implementation had good fail-closed semantics (injection-shaped input rejection, no action-like data, prediction-market credential isolation).

Why the branch was not ingested: it implemented an ECC-side parallel Itô client (scripts/lib/ito/*), which the canonical contract forbids — ECC delegates to the separately installed ito-compute-cli and implements no parallel client, reservation, or workload runner. Any revival must be a thin read-only planner that shells to the canonical CLI's inventory/read surface and stops before find (which submits an RFQ). Blocked until the runtime exposes a read-only inventory command (current CLI folds inventory into find).