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>

pkg/vetting/assessment_test.go

@@ -13,7 +13,7 @@
 // PERFORMANCE OF THIS SOFTWARE.
 
 // This test file is white-box (package vetting, not vetting_test) so it
-// can reach the unexported vendorInfoOutputType helper.
+// can reach the unexported thirdPartyInfoOutputType helper.
 
 package vetting
 
@@ -25,10 +25,10 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestVendorInfoOutputType_DecoratesEnums(t *testing.T) {
+func TestThirdPartyInfoOutputType_DecoratesEnums(t *testing.T) {
 	t.Parallel()
 
-	outputType, err := vendorInfoOutputType()
+	outputType, err := thirdPartyInfoOutputType()
 	require.NoError(t, err)
 	require.NotNil(t, outputType)
 
@@ -42,8 +42,8 @@ func TestVendorInfoOutputType_DecoratesEnums(t *testing.T) {
 		field    string
 		expected []string
 	}{
-		{"category", vendorCategoryEnum},
-		{"vendor_type", vendorTypeEnum},
+		{"category", thirdPartyCategoryEnum},
+		{"third_party_type", thirdPartyTypeEnum},
 	}
 
 	for _, tt := range tests {