update docs

docs/ooredooapi/01-number-validation.md

@@ -32,19 +32,23 @@ curl --request GET \
 
 ## Responses
 
+All responses wrap the result in a top-level `data` object.
+
 ### Success — Prepaid
 
 ```json
 {
-  "custType": "PRE",
-  "msisdn": "9609654321"
+  "data": {
+    "custType": "PRE",
+    "msisdn": "9609654321"
+  }
 }
 ```
 
 | Field | Type | Description |
 |---|---|---|
-| `custType` | `string` | `"PRE"` = prepaid customer |
-| `msisdn` | `string` | The MSISDN that was queried |
+| `data.custType` | `string` | `"PRE"` = prepaid customer |
+| `data.msisdn` | `string` | The MSISDN that was queried |
 
 → Offer **Raastas** top-up only.
 
@@ -54,8 +58,10 @@ curl --request GET \
 
 ```json
 {
-  "custType": "POST",
-  "msisdn": "9609123456"
+  "data": {
+    "custType": "POST",
+    "msisdn": "9609123456"
+  }
 }
 ```
 
@@ -67,8 +73,10 @@ curl --request GET \
 
 ```json
 {
-  "custType": "HYBRID",
-  "msisdn": "9609789012"
+  "data": {
+    "custType": "HYBRID",
+    "msisdn": "9609789012"
+  }
 }
 ```
 
@@ -80,18 +88,20 @@ curl --request GET \
 
 ```json
 {
-  "custType": null,
-  "errorMessage": "Data Not Found",
-  "msisdn": "9609000000"
+  "data": {
+    "custType": null,
+    "errorMessage": "Data Not Found",
+    "msisdn": "9609000000"
+  }
 }
 ```
 
 | Field | Type | Description |
 |---|---|---|
-| `custType` | `null` | Number is not an Ooredoo subscriber |
-| `errorMessage` | `string` | `"Data Not Found"` |
+| `data.custType` | `null` | Number is not an Ooredoo subscriber |
+| `data.errorMessage` | `string` | `"Data Not Found"` |
 
-Treat `custType: null` as unsupported — fall back to Dhiraagu lookup.
+Treat `custType: null` or absent as unsupported — fall back to Dhiraagu lookup.
 
 ---