AI Price Radar v3.3.0 — Shop Intake & Email Notifications

This release turns shop-submission review into a durable workflow and adds timely email notifications for administrators and applicants.

What changed

Store every shop request as a source-intake record with explicit review and validation states.
Let administrators approve, reject, retry, and inspect notification delivery from the admin panel.
Notify configured administrators when a request arrives and notify applicants when it is submitted, approved, rejected, validated, or published.
Use Resend as the preferred production email provider while retaining SMTP for local Mailpit testing and fallback delivery.
Deliver mail through a transactional outbox with idempotent processing and 1, 5, and 30 minute retry delays.
Let LDXP crawler and pipeline jobs claim approved requests with a lease and report sanitized validation results.

Run scripts/migrate_shop_intake_v6.py before switching the API. The migration is idempotent and must first be exercised twice against a temporary PostgreSQL database.
Start the notification-worker service alongside the API.
Set a dedicated INTAKE_WORKER_KEY that differs from ADMIN_API_KEY.
Configure SHOP_INTAKE_ADMIN_EMAILS and either:
- RESEND_API_KEY plus a verified-domain RESEND_FROM, or
- SMTP_HOST plus SMTP_FROM and any required SMTP credentials.
Replace the re_xxxxxxxxx example with a newly generated real Resend API key only in the production .env; never commit it to Git.