preinstall-check
Validate a values.yaml and verify cluster + dependency reachability before running `helm install` for the LlamaCloud chart. Use when the user says "preinstall check", "validate my values", "check before install", "preflight", or before any first-time install or upgrade. Performs static schema validation, cluster capacity inspection, local network probes, and read-only routing checks against managed cloud services (AWS / Azure / GCP). Fully read-only by default; only one optional phase can create a short-lived Job, and only with explicit user consent.