fix: gate workspace diagnostic migration

backend/src/workspaces/contracts.ts

@@ -1,5 +1,5 @@
 import { validateCanonicalWorkspace } from "./schema.js";
-import type { CanonicalWorkspace, DwhTransport, VectorTransport } from "./schema.js";
+import type { DwhTransport, VectorTransport, WorkspaceDescriptor } from "./schema.js";
 
 export type InstallationRole = "DWH" | "VECTOR" | "VECTOR_WRITER" | "EMBEDDING";
 export type InstallationSuffix =
@@ -68,7 +68,7 @@ const EMBEDDING_SUFFIXES: readonly InstallationSuffix[] = [
   "TLS_CA_FILE",
 ];
 
-function namespaceFor(workspace: CanonicalWorkspace): string {
+function namespaceFor(workspace: WorkspaceDescriptor): string {
   return workspace.workspace.id.replaceAll("-", "_").toUpperCase();
 }
 
@@ -119,7 +119,7 @@ function connectorVariables(
   ];
 }
 
-export function buildInstallationContract(workspace: CanonicalWorkspace): InstallationContract {
+export function buildInstallationContract(workspace: WorkspaceDescriptor): InstallationContract {
   const canonical = validateCanonicalWorkspace(workspace);
   const namespace = namespaceFor(canonical);
 
@@ -141,13 +141,13 @@ export function buildInstallationContract(workspace: CanonicalWorkspace): Instal
   };
 }
 
-function localizedIntroduction(workspace: CanonicalWorkspace): string {
+function localizedIntroduction(workspace: WorkspaceDescriptor): string {
   return workspace.workspace.language === "it"
     ? `Configurazione dell'installazione per ${workspace.workspace.name}. Imposta solo i binding supportati da questa installazione.`
     : `Installation setup for ${workspace.workspace.name}. Configure only the bindings supported by this installation.`;
 }
 
-export function renderWorkspaceDocs(workspace: CanonicalWorkspace): { envExample: string; markdown: string } {
+export function renderWorkspaceDocs(workspace: WorkspaceDescriptor): { envExample: string; markdown: string } {
   const canonical = validateCanonicalWorkspace(workspace);
   const contract = buildInstallationContract(canonical);
   const variablesByRole = new Map<InstallationRole, InstallationVariable[]>();