docs(discovery): publish provisional feature baseline

docs/discovery/domains/contact.md

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+# Contact
+
+Features in this document are generated from [`../feature-catalog.json`](../feature-catalog.json), the canonical inventory.
+
+## CONTACT-001 — CardDAV Contact Management & Address Book Integration
+
+- **Domain**: `contact`
+- **Status**: `verified`
+- **Evidence Maturity**: `E0`
+- **Commit Verified**: `d8a2059df8e53bc7275c45339849d14c8651e73c`
+- **Runtime Validation**: not-required — No separate environment-dependent runtime validation was identified during this documentation pass.
+
+### Purpose
+
+Connects to CardDAV servers, imports VCard contacts, and provides contact lookup for email/calendar autocomplete.
+
+### Evidence summary
+
+- `routes/contacts/contacts_routes.py` — `@router.get('/list')` — Returns contact list filtered by search query.
+- `src/tools/contacts.py` — `ContactsTool` — Agent tool for querying user address book contacts.
+
+### Unknowns
+
+- VCard 3.0 vs 4.0 property parsing mismatches.