feat: atomic solo-parent flip on Add Member apply (+ Postman tests)

Bumps dswd-4ps-dp-openspp-v2-module to apply the parent's is_solo_parent
flip in the same transaction as the Add Member CR (no auto-CR), and
adds Postman tests for the success path (single CR, no auto-update_individual_4ps)
and the 422 conflict path (addMembers vs memberList disagreement).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: haklyray

DSWD/dswd-4ps-dp-openspp-v2-module

@@ -145,10 +145,14 @@
             "exec": [
               "pm.test('Status is 201', () => pm.response.to.have.status(201));",
               "const json = pm.response.json();",
-              "pm.test('Created 1 CR (add_member_4ps)', () => pm.expect(json.changeRequestCount).to.equal(1));",
+              "pm.test('Exactly 1 CR is created (no separate solo-parent auto-CR)', () => pm.expect(json.changeRequestCount).to.equal(1));",
               "const addCR = json.changeRequests.find(cr => cr.requestType.code === 'add_member_4ps');",
               "pm.test('Has add_member_4ps CR', () => pm.expect(addCR).to.not.be.undefined);",
               "pm.test('Is newborn', () => pm.expect(addCR.detail.is_newborn_child).to.be.true);",
+              "pm.test('Add Member CR is the only CR (apply directly updates parent)', () => {",
+              "    const updateInd = json.changeRequests.find(cr => cr.requestType.code === 'update_individual_4ps');",
+              "    pm.expect(updateInd, 'no update_individual_4ps CR should be auto-created').to.be.undefined;",
+              "});",
               "console.log('Ticket:', json.ticketNumber, '| CRs:', json.changeRequestCount);"
             ]
           }
@@ -173,6 +177,47 @@
         }
       }
     },
+    {
+      "name": "Add Newborn — conflicting solo parent (422)",
+      "event": [
+        {
+          "listen": "test",
+          "script": {
+            "type": "text/javascript",
+            "exec": [
+              "pm.test('Status is 422', () => pm.response.to.have.status(422));",
+              "const json = pm.response.json();",
+              "pm.test('Error mentions conflicting isSoloParent', () => {",
+              "    const detail = (json.detail || json.message || '').toString();",
+              "    pm.expect(detail.toLowerCase()).to.include('conflict');",
+              "});",
+              "pm.test('Error names the disputed memberId4ps', () => {",
+              "    const detail = (json.detail || json.message || '').toString();",
+              "    pm.expect(detail).to.include('1101463');",
+              "});"
+            ]
+          }
+        }
+      ],
+      "request": {
+        "method": "POST",
+        "header": [],
+        "body": {
+          "mode": "raw",
+          "raw": "{\n  \"listahananId\": \"716649470-0-43202834\",\n  \"autoSubmit\": false,\n  \"description\": \"Conflict: newborn relationship says parent 1101463 is solo, memberList says they are not\",\n  \"addMembers\": [\n    {\n      \"givenName\": \"Baby\",\n      \"familyName\": \"AQUINO\",\n      \"birthdate\": \"2026-03-01\",\n      \"gender\": {\n        \"system\": \"urn:iso:std:iso:5218\",\n        \"code\": \"2\"\n      },\n      \"relationshipToHead\": {\n        \"system\": \"urn:openspp:vocab:relationship\",\n        \"code\": \"grandchild\"\n      },\n      \"isNewbornChild\": true,\n      \"hasNoParents\": false,\n      \"parentRelationships\": [\n        {\n          \"member\": {\n            \"memberId4ps\": \"1101463\"\n          },\n          \"relationship\": {\n            \"system\": \"urn:openspp:vocab:relationship\",\n            \"code\": \"parent\"\n          },\n          \"isSoloParent\": true\n        }\n      ]\n    }\n  ],\n  \"memberList\": [\n    {\n      \"memberId4ps\": \"1101463\",\n      \"isSoloParent\": false\n    }\n  ]\n}",
+          "options": {
+            "raw": {
+              "language": "json"
+            }
+          }
+        },
+        "url": {
+          "raw": "{{api_base}}/4ps/ChangesSubmission",
+          "host": ["{{api_base}}"],
+          "path": ["4ps", "ChangesSubmission"]
+        }
+      }
+    },
     {
       "name": "Delist Household (Reset for Reinstatement Test)",
       "event": [