Google Ad Manager SOAP migration

Turn legacy PQL into a reviewable REST plan.

Compile a conservative subset of Publisher Query Language into a Google Ad Manager REST filter plan, surface blockers, and retain a source-free conformance receipt.

• Runs locally with Deno and no network access
• Strict field maps, typed binds, pagination blockers, and deterministic hashes
• Never sends query text, customer data, credentials, or receipts to a service

Checkout remains unavailable until release approval, artifact hash, domain, and the exact Stripe Price converge.