Add user_notes_count integer field to VulnerabilityType

doc/api/graphql/reference/gitlab_schema.graphql

@@ -11600,6 +11600,11 @@ type Vulnerability {
   """
   title: String
 
+  """
+  Number of user notes attached to the vulnerability
+  """
+  userNotesCount: Int!
+
   """
   Permissions for the current user on the resource
   """

doc/api/graphql/reference/gitlab_schema.json

@@ -34436,6 +34436,24 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "userNotesCount",
+              "description": "Number of user notes attached to the vulnerability",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Int",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "userPermissions",
               "description": "Permissions for the current user on the resource",

doc/api/graphql/reference/index.md

@@ -1763,6 +1763,7 @@ Represents a vulnerability.
 | `severity` | VulnerabilitySeverity | Severity of the vulnerability (INFO, UNKNOWN, LOW, MEDIUM, HIGH, CRITICAL) |
 | `state` | VulnerabilityState | State of the vulnerability (DETECTED, DISMISSED, RESOLVED, CONFIRMED) |
 | `title` | String | Title of the vulnerability |
+| `userNotesCount` | Int! | Number of user notes attached to the vulnerability |
 | `userPermissions` | VulnerabilityPermissions! | Permissions for the current user on the resource |
 | `vulnerabilityPath` | String | URL to the vulnerability's details page |
 

ee/app/graphql/types/vulnerability_type.rb

@@ -27,6 +27,9 @@ module Types
     field :report_type, VulnerabilityReportTypeEnum, null: true,
           description: "Type of the security report that found the vulnerability (#{::Vulnerabilities::Occurrence::REPORT_TYPES.keys.join(', ').upcase})"
 
+    field :user_notes_count, GraphQL::INT_TYPE, null: false,
+          description: 'Number of user notes attached to the vulnerability'
+
     field :vulnerability_path, GraphQL::STRING_TYPE, null: true,
           description: "URL to the vulnerability's details page",
           resolve: -> (obj, _args, _ctx) { ::Gitlab::Routing.url_helpers.project_security_vulnerability_path(obj.project, obj) }

ee/spec/graphql/types/vulnerability_type_spec.rb

@@ -8,7 +8,7 @@ describe GitlabSchema.types['Vulnerability'] do
   let_it_be(:vulnerability) { create(:vulnerability, project: project) }
 
   let(:fields) do
-    %i[userPermissions id title description state severity report_type vulnerability_path location project]
+    %i[userPermissions id title description user_notes_count state severity report_type vulnerability_path location project]
   end
 
   before do