Rename vendors to third parties

Renames the user-facing 'vendor' concept to 'third party' across the
entire codebase. The shared common_third_parties reference table is
unchanged.

Migration. Renames the vendor_category enum, the vendors and
vendor_<entity> tables (contacts, services, compliance_reports,
business_associate_agreements, data_privacy_agreements,
risk_assessments) and their vendor_id columns, the asset_vendors /
data_vendors / processing_activity_vendors junction tables,
generated_documents.vendors_document_id, the webhook_event_type
'vendor:<verb>' values, and the snapshots_type 'VENDORS' value.

Backend. Renames coredata models and SQL queries, probo services,
GraphQL / MCP API surface, console / trust / webhook resolvers and
types, the CLI (prb vendor* -> prb third-party*; pkg/cmd/vendormgmt
-> pkg/cmd/thirdpartymgmt), the document generator, vetting agent
prompts, and the common-third-parties-import command.

Frontend, packages, n8n, e2e. Renames apps/console pages, components,
hooks, routes, dialogs, and tabs; the shared @probo/vendors package
(now @probo/third-parties); the @probo/ui Vendors atoms (now
ThirdParties, VendorLogo -> ThirdPartyLogo); the n8n community node
actions/vendor folder (now actions/thirdParty); and the e2e Go test
suite (console and MCP). Filesystem and URL paths use kebab-case
(third-parties), GraphQL fields and TypeScript identifiers use
camelCase (thirdParty / thirdParties), Go types use PascalCase
(ThirdParty), and human-facing text uses 'third party' with a space.

Co-authored-by: Bryan Frimin <bryan@getprobo.com>
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

e2e/mcp/third_party_test.go

@@ -0,0 +1,117 @@
+// Copyright (c) 2025-2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package mcp_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.probo.inc/probo/e2e/internal/factory"
+	"go.probo.inc/probo/e2e/internal/testutil"
+)
+
+func TestMCP_ThirdParty_CRUD(t *testing.T) {
+	t.Parallel()
+	owner := testutil.NewClient(t, testutil.RoleOwner)
+	mc := testutil.NewMCPClient(t, owner)
+	orgID := owner.GetOrganizationID().String()
+
+	// Create
+	var addResult struct {
+		ThirdParty struct {
+			ID   string `json:"id"`
+			Name string `json:"name"`
+		} `json:"third_party"`
+	}
+	name := factory.SafeName("ThirdParty")
+	mc.CallToolInto("addThirdParty", map[string]any{
+		"organizationId": orgID,
+		"name":           name,
+	}, &addResult)
+	require.NotEmpty(t, addResult.ThirdParty.ID)
+	assert.Equal(t, name, addResult.ThirdParty.Name)
+
+	// Update
+	var updateResult struct {
+		ThirdParty struct {
+			ID   string `json:"id"`
+			Name string `json:"name"`
+		} `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)
+
+	// List
+	var listResult struct {
+		ThirdParties []struct {
+			ID string `json:"id"`
+		} `json:"third_parties"`
+	}
+	mc.CallToolInto("listThirdParties", map[string]any{
+		"organizationId": orgID,
+	}, &listResult)
+	assert.NotEmpty(t, listResult.ThirdParties)
+
+	// Delete
+	var deleteResult struct {
+		DeletedThirdPartyID string `json:"deletedThirdPartyId"`
+	}
+	mc.CallToolInto("deleteThirdParty", map[string]any{
+		"id": addResult.ThirdParty.ID,
+	}, &deleteResult)
+	assert.Equal(t, addResult.ThirdParty.ID, deleteResult.DeletedThirdPartyID)
+
+	// Update deleted thirdParty returns sanitized not-found error
+	msg := mc.CallToolExpectToolError("updateThirdParty", map[string]any{
+		"id":   addResult.ThirdParty.ID,
+		"name": "Should Fail",
+	})
+	assert.Equal(t, "resource not found", msg)
+}
+
+func TestMCP_ThirdParty_ValidationError(t *testing.T) {
+	t.Parallel()
+	owner := testutil.NewClient(t, testutil.RoleOwner)
+	mc := testutil.NewMCPClient(t, owner)
+	orgID := owner.GetOrganizationID().String()
+
+	msg := mc.CallToolExpectToolError("addThirdParty", map[string]any{
+		"organizationId": orgID,
+		"name":           "",
+	})
+	assert.Contains(t, msg, "name")
+	assert.NotContains(t, msg, "pq:")
+	assert.NotContains(t, msg, "sql:")
+}
+
+func TestMCP_ThirdParty_PermissionDenied(t *testing.T) {
+	t.Parallel()
+	owner := testutil.NewClient(t, testutil.RoleOwner)
+	orgID := owner.GetOrganizationID().String()
+	viewer := testutil.NewClientInOrg(t, testutil.RoleViewer, owner)
+	viewerMC := testutil.NewMCPClient(t, viewer)
+
+	msg := viewerMC.CallToolExpectToolError("addThirdParty", map[string]any{
+		"organizationId": orgID,
+		"name":           factory.SafeName("ThirdParty"),
+	})
+	assert.Contains(t, msg, "permission denied")
+	assert.NotContains(t, msg, "pq:")
+	assert.NotContains(t, msg, "sql:")
+}