feat(billing): Stripe tier provisioning script (Pay-per-Use / Pro / Scale)

[MoltyCel]

Summary

• Adds scripts/stripe_setup_tiers.py — single source of truth for the four MolTrust billing tiers in Stripe.
• Dry-run by default. Re-runs are safe (every Price has a lookup_key; the script looks up before creating). Nothing in Stripe changes until --live is passed.

Tier catalogue

Tier	Stripe shape	Pricing
Free	None — enforced in API	Max 5 agents, validity ≤ 30 days, score capped at 60
Pay-per-Use	1 product, 4 metered CHF prices	Renewal CHF 0.20 · Issuance CHF 0.30 · On-chain anchor CHF 0.50 · Compliance export CHF 19
Professional	1 product, 1 recurring price	CHF 99/mo · unlimited renewals + anchoring · quarterly export · 99% SLA · validity ≤ 90 days
Scale	1 product, 1 recurring price	CHF 299/mo · monthly export · anomaly alerts · 7-year retention · validity ≤ 365 days

Usage

set -a && source ~/.moltrust_secrets && set +a

# Show what would happen — touches nothing in Stripe
python3 scripts/stripe_setup_tiers.py

# Apply for real (idempotent — safe to re-run)
python3 scripts/stripe_setup_tiers.py --live

Verified

• Compile check (py_compile) — clean
• Dry-run against production STRIPE_SECRET_KEY on the server — emits the full JSON catalogue with action: would-create for every resource, does not call any mutating Stripe endpoint
• --live run is intentionally deferred — Lars to execute and verify the resulting Price IDs in the Stripe Dashboard, then paste them into ~/.moltrust_secrets / DB config

Out of scope (intentional)

• Free tier: enforced in API (app/billing.py rate-limit + validity-cap), no Stripe entity to create.
• API-layer wiring to bill against these tiers (Customer linkage, metered-usage reporting) — separate PR once Price IDs are minted and pasted into secrets.

Dry-run sample output

{
  "mode": "dry-run",
  "tier_free": "no_stripe_entity_enforced_in_api",
  "tiers": {
    "pay_per_use":   { "product": { "action": "would-create" }, "prices": [ ...4 prices... ] },
    "professional":  { "product": { "action": "would-create" }, "prices": [ ...1 price... ] },
    "scale":         { "product": { "action": "would-create" }, "prices": [ ...1 price... ] }
  }
}

🤖 Generated with Claude Code