Move document type from document to document version

Follow the same pattern used for classification: document type now lives
exclusively on DocumentVersion. A migration copies existing values from
documents to their versions. The document filter uses a subquery on the
latest version. All three API surfaces (GraphQL, MCP, CLI), resolvers,
frontend, and e2e tests are updated accordingly.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

apps/console/src/components/documents/LinkedDocumentsCard.tsx

@@ -44,11 +44,11 @@ const linkedDocumentFragment = graphql`
   fragment LinkedDocumentsCardFragment on Document {
     id
     title
-    documentType
     versions(first: 1) {
       edges {
         node {
           id
+          documentType
           status
         }
       }
@@ -221,7 +221,7 @@ function DocumentRow(props: {
         </div>
       </Td>
       <Td>
-        <DocumentTypeBadge type={document.documentType} />
+        <DocumentTypeBadge type={document.versions.edges[0].node.documentType} />
       </Td>
       <Td>
         <DocumentVersionBadge state={document.versions.edges[0].node.status} />

apps/console/src/components/documents/LinkedDocumentsDialog.tsx

@@ -72,7 +72,13 @@ const documentsFragment = graphql`
         node {
           id
           title
-          documentType
+          versions(first: 1, orderBy: { field: CREATED_AT, direction: DESC }) {
+            edges {
+              node {
+                documentType
+              }
+            }
+          }
         }
       }
     }
@@ -187,7 +193,7 @@ function DocumentRow(props: RowProps) {
       onClick={() => onClick(props.document.id)}
     >
       {props.document.title}
-      <DocumentTypeBadge type={props.document.documentType} />
+      <DocumentTypeBadge type={props.document.versions.edges[0].node.documentType} />
       <Button
         disabled={props.disabled}
         className="ml-auto"