Add documentation for patients missing date of birth and address

Care/Operations/patients_without_dob_address_pallium.md

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+
+# Patients Without DOB and Address - Pallium
+
+> List of patients who are missing both date of birth and address
+
+## Purpose
+
+Identifies patient records where **both** `date_of_birth` and `address` are missing so the team can follow up and complete the records. 
+
+## Parameters
+
+*No parameters — the query returns all matching patients.*
+
+---
+
+## Query
+
+```sql
+SELECT
+    p.name AS patient_name,
+    p.date_of_birth,
+    p.address,
+    p.external_id AS external_id,
+    pi.value AS ssmm_id
+FROM emr_patient p
+LEFT JOIN emr_patientidentifier pi ON p.id = pi.patient_id AND pi.config_id = 4
+WHERE p.date_of_birth IS NULL 
+  AND (p.address IS NULL OR p.address = '')
+ORDER BY p.name;
+```
+
+
+## Notes
+
+- **Hardcoded values:**
+  - `pi.config_id = 4` — the identifier config representing the Pallium ID. Update if the config ID changes.
+- Results are ordered alphabetically by `patient_name`.
+
+*Last updated: 2026-05-25*
+
+
+`````