v0.3.0

What's Changed

• Flatten merchant owner/address to drop leaking hrefs by @SBolivarLoL in #20
• feat(multitenant): identity→merchant mapping + whoami probe (v2 phase 2) by @SBolivarLoL in #21
• feat(multitenant): header-based identity + whoami header probe by @SBolivarLoL in #22
• feat(multitenant): recognize Horizon identity headers + whoami resolution preview by @SBolivarLoL in #23
• docs(roadmap): production multi-tenant plan by @SBolivarLoL in #24
• fix(multitenant): bootstrap empty oauth_refresh token + isolate per-tenant store by @SBolivarLoL in #25
• feat: add list_refunds and list_tenders read tools by @SBolivarLoL in #26
• fix: get_order now returns the order's payments by @SBolivarLoL in #27
• audit: verify /tenders live against sandbox (🟡→✅) by @SBolivarLoL in #28
• feat: §A coverage — list_roles, get_merchant_properties, list_item_groups by @SBolivarLoL in #29
• release: 0.3.0 by @SBolivarLoL in #30
• docs: roadmap for a complete agent-ready v1.0 by @SBolivarLoL in #31

Full Changelog: v0.2.0...v0.3.0