feat(12-01): extend offer schema with tier, pricing, and category fields
- Add additive offer_macros columns: description, category, ticket, is_archived, and structured transformation-promise fields (cliente_ideale/risultato/tempo/pain/metodo)
- Add additive offer_micros columns: tier_letter (A/B/C, CHECK constraint added in migration 0008) and public_price
- Add new offer_tier_services junction table (offer_micros <-> services), relations, and types
- Extend offerMicrosRelations with tierServices; legacy offer_micro_services/offer_services untouched
simone
11d6c1179f