NPA-3887 Add Sandbox constraints section

Author: JackPlowman

specification/validated-relationships-service-api.yaml

@@ -262,12 +262,14 @@ paths:
         | Verify Relationship between proxy and patient and include patient's details | `identifier`=`9000000017` and `patient:identifier`=`9000000009` and `_include`=`RelatedPerson:patient` | HTTP Status 200 Verified relationship between patient and proxy and includes patient's details |
         | Verify Relationship between proxy and patient                               | `identifier`=`9000000017` and `patient:identifier`=`9000000025`                                        | HTTP Status 200 Verified relationship between patient and proxy                                |
         | Verify Relationship between proxy and patient and include patient's details | `identifier`=`9000000017` and `patient:identifier`=`9000000025` and `_include`=`RelatedPerson:patient` | HTTP Status 200 Verified relationship between patient and proxy and includes patient's details |
-        | Missing identifier                                                          | `patient:identifier`=`9000000009`                                                                      | HTTP Status 400 and MISSING_IDENTIFIER_VALUE error message                                     |
-        | Invalid identifier                                                          | `identifier`=`900000000` Note: This identifier is 9 characters long too short to be NHS Number         | HTTP Status 400 and INVALID_IDENTIFIER_VALUE error message                                     |
-        | Invalid identifier system                                                   | `identifier`=`https://fhir.nhs.uk/Id/nhs-number/9730675929`                                            | HTTP Status 400 and INVALID_IDENTIFIER_SYSTEM error message                                    |
-        | Identifier not supported in sandbox                                         | `identifier`=`1000000001`                                                                              | HTTP Status 404 and INVALIDATED_RESOURCE error message                                    |
-
-        NOTE: Headers are not tested in the sandbox. `X-Request-ID` and `X-Correlation-ID` are disregarded.
+        | Missing identifier                                                          | `patient:identifier`=`9000000009`                                                                      | HTTP Status 400 and MISSING_IDENTIFIER_VALUE error response                                     |
+        | Invalid identifier                                                          | `identifier`=`900000000` Note: This identifier is 9 characters long, too short to be NHS Number         | HTTP Status 400 and INVALID_IDENTIFIER_VALUE error response                                     |
+        | Invalid identifier system                                                   | `identifier`=`https://fhir.nhs.uk/Id/nhs-number/9730675929`                                            | HTTP Status 400 and INVALID_IDENTIFIER_SYSTEM error response                                    |
+        | Identifier not supported in sandbox                                         | `identifier`=`1000000001`                                                                              | HTTP Status 404 and INVALIDATED_RESOURCE error response                                    |
+
+        ### Sandbox constraints
+          - Headers are not tested. `X-Request-ID` and `X-Correlation-ID` are disregarded.
+          - `patient:identifier` is not validated.
 
         Or perhaps you'd like to try out the sandbox using our 'Try it out' feature.