Add documentation for Fake IP Encounters with Bed Assignment query

Care/Encounter/fakeipencounter.md

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+
+# Fake IP Encounters with Bed Assignment
+
+> List of in-patient (IP) encounters that currently hold a bed under the "fake" beds root location (`root_location_id = 300`)
+
+## Purpose
+
+Returns all active in-patient (`encounter_class = 'imp'`) encounters that are currently occupying a bed (`fle.end_datetime IS NULL`) under the **fake beds** root location (`root_location_id = 300`).
+
+## Parameters
+
+| Parameter | Type | Description | Example |
+|-----------|------|-------------|---------|
+| `created_date` | DATE | Filter by encounter creation date range | `e.created_date BETWEEN '2026-04-01' AND '2026-04-22'` |
+
+---
+
+## Query
+
+```sql
+SELECT DISTINCT ON (e.id)
+    p.name AS patient_name,
+    pi.value AS ssmm_id,
+    e.created_date,
+    fl.name AS bed_name,
+    fle.created_date AS bed_assigned_date,
+    TRIM(u2.first_name || ' ' || COALESCE(u2.last_name, '')) AS bed_assigned_by
+FROM emr_encounter e
+JOIN emr_patient p ON e.patient_id = p.id
+LEFT JOIN emr_patientidentifier pi
+    ON p.id = pi.patient_id
+   AND pi.config_id = 21
+JOIN users_user u ON e.created_by_id = u.id
+JOIN emr_facilitylocationencounter fle ON fle.encounter_id = e.id
+JOIN emr_facilitylocation fl
+    ON fle.location_id = fl.id
+   AND fl.form = 'bd'
+   AND fl.root_location_id = 300
+WHERE e.encounter_class = 'imp'
+  AND e.deleted = FALSE
+  AND fle.status = 'active'
+  --[[AND {{created_date}}]]
+ORDER BY e.id, fle.created_date DESC;
+```
+
+
+## Notes
+
+- Restricted to in-patient encounters (`encounter_class = 'imp'`) that are non-deleted.
+- Hardcoded to:
+  - `fl.form = 'bd'` — only bed-type facility locations.
+  - `fl.root_location_id = 300` — the **fake beds root location**; every bed under this root is treated as a fake/placeholder bed. Update if the root ID changes.
+  - `pi.config_id = 21` — SSMM patient identifier configuration (update if the config changes).
+- Metabase-specific filters (`[[...]]`) allow dynamic filtering in dashboards.
+
+*Last updated: 2026-04-24*
+
+````