v0.3.0

Added

• Opt-in anonymous telemetry — measures self-hosted activation (how
  many instances reach their first real invoice) so the project can see
  adoption without a hosted service. Strictly opt-in (TELEMETRY_OPTIN=
  true); default OFF means zero network calls and zero data written.
  When enabled: a random instance ID, once-ever milestone events, and a
  24h heartbeat with range-bucketed counts — never amounts, names,
  emails, keys, IDs, or exact numbers. docs/telemetry.md documents every
  payload and the one-line opt-out.
• One-click deploy — Render, Railway, and DigitalOcean templates
  with README deploy buttons; a devcontainer for Codespaces; and a real
  Next.js starter in examples/ (pricing, signup, usage with entitlement
  headroom, feature gating) that builds and runs against make demo.
• Competitor comparison pages — honest /vs/ pages for Lago,
  Flexprice, Kill Bill, Chargebee, and Stripe Billing.
• Cloud operations groundwork — a keystroke-level provisioning
  runbook for the first manually-provisioned cloud customers, and a
  status-page plan.