docs(discovery): publish provisional feature baseline

docs/discovery/domains/calendar.md

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+# Calendar
+
+Features in this document are generated from [`../feature-catalog.json`](../feature-catalog.json), the canonical inventory.
+
+## CALENDAR-001 — CalDAV Calendar Synchronization & Account Setup
+
+- **Domain**: `calendar`
+- **Status**: `verified`
+- **Evidence Maturity**: `E0`
+- **Commit Verified**: `d8a2059df8e53bc7275c45339849d14c8651e73c`
+- **Runtime Validation**: pending — Requires a controlled external CalDAV server.
+
+### Purpose
+
+Connects to remote CalDAV servers (Apple iCloud, Nextcloud, Google) to sync calendar event feeds.
+
+### Evidence summary
+
+- `routes/calendar_routes.py` — `setup_calendar_routes` — Exposes CalDAV setup and manual sync trigger routes.
+- `src/caldav_sync.py` — `CalDavSync` — Fetches and parses remote iCalendar VEVENT objects.
+
+### Unknowns
+
+- Invalid SSL certificates on self-hosted CalDAV servers.
+
+## CALENDAR-002 — Calendar Event Operations & iCalendar Parsing
+
+- **Domain**: `calendar`
+- **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
+
+Creates, updates, deletes, and displays calendar events with timezone conversion and reminder notifications.
+
+### Evidence summary
+
+- `routes/calendar_routes.py` — `@router.get('/events')` — Fetches calendar events for requested date window.
+- `src/tools/calendar.py` — `CalendarTool` — Agent tool for creating and modifying calendar entries.
+
+### Unknowns
+
+- Recurring RRULE event expansion calculation bugs across leap years.