Publish sanitized sample readiness report and receipt artifacts

[LarryLemonBot]

Roadmap item for reviewer-friendly examples.

Goal:
Add static sample artifacts generated from sanitized public/demo data:

• a readiness report
• a trust receipt
• a compact launch-pack excerpt

Acceptance criteria:

• No secrets, customer data, private paths, raw payment signatures, or live private endpoints.
• Samples clearly label themselves as examples.
• Samples repeat the claim boundary: observed public metadata and unpaid 402 behavior only.