Preserve third party category on partial update

When category was omitted from an MCP, GraphQL, or CLI update payload,
ThirdPartyService.Update overwrote the stored category with OTHER. Only
apply category when the request explicitly includes it, matching other
optional fields on the same update path.

Add an MCP e2e test that updates name without category and asserts the
existing category is unchanged.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

e2e/mcp/third_party_test.go

@@ -92,6 +92,43 @@ func TestMCP_ThirdParty_CRUD(t *testing.T) {
 	assert.Equal(t, "resource not found", msg)
 }
 
+func TestMCP_ThirdParty_UpdatePreservesCategoryWhenOmitted(t *testing.T) {
+	t.Parallel()
+	owner := testutil.NewClient(t, testutil.RoleOwner)
+	mc := testutil.NewMCPClient(t, owner)
+	orgID := owner.GetOrganizationID().String()
+
+	var addResult struct {
+		ThirdParty struct {
+			ID       string `json:"id"`
+			Category string `json:"category"`
+		} `json:"third_party"`
+	}
+
+	name := factory.SafeName("ThirdParty")
+	mc.CallToolInto("addThirdParty", map[string]any{
+		"organizationId": orgID,
+		"name":           name,
+		"category":       "CLOUD_PROVIDER",
+	}, &addResult)
+	require.NotEmpty(t, addResult.ThirdParty.ID)
+	assert.Equal(t, "CLOUD_PROVIDER", addResult.ThirdParty.Category)
+
+	var updateResult struct {
+		ThirdParty struct {
+			ID       string `json:"id"`
+			Name     string `json:"name"`
+			Category string `json:"category"`
+		} `json:"third_party"`
+	}
+	mc.CallToolInto("updateThirdParty", map[string]any{
+		"id":   addResult.ThirdParty.ID,
+		"name": "Updated ThirdParty",
+	}, &updateResult)
+	assert.Equal(t, "Updated ThirdParty", updateResult.ThirdParty.Name)
+	assert.Equal(t, "CLOUD_PROVIDER", updateResult.ThirdParty.Category)
+}
+
 func TestMCP_ThirdParty_ValidationError(t *testing.T) {
 	t.Parallel()
 	owner := testutil.NewClient(t, testutil.RoleOwner)

pkg/probo/third_party_service.go

@@ -408,8 +408,6 @@ func (s ThirdPartyService) Update(
 
 			if req.Category != nil {
 				thirdParty.Category = *req.Category
-			} else {
-				thirdParty.Category = coredata.ThirdPartyCategoryOther
 			}
 
 			if req.SecurityPageURL != nil {