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>

pkg/server/api/mcp/v1/schema.resolvers.go

@@ -2095,7 +2095,6 @@ func (r *Resolver) UpdateDocumentTool(ctx context.Context, req *mcp.CallToolRequ
 		probo.UpdateDocumentRequest{
 			DocumentID:            input.ID,
 			Title:                 input.Title,
-			DocumentType:          input.DocumentType,
 			TrustCenterVisibility: input.TrustCenterVisibility,
 		},
 	)
@@ -2201,6 +2200,7 @@ func (r *Resolver) UpdateDocumentVersionTool(ctx context.Context, req *mcp.CallT
 			ID:             input.DocumentVersionID,
 			Content:        content,
 			Classification: input.Classification,
+			DocumentType:   input.DocumentType,
 		},
 	)
 	if err != nil {

pkg/server/api/mcp/v1/specification.yaml

@@ -5207,7 +5207,6 @@ components:
         - id
         - organization_id
         - title
-        - document_type
         - trust_center_visibility
         - status
         - created_at
@@ -5222,9 +5221,6 @@ components:
         title:
           type: string
           description: Document title
-        document_type:
-          $ref: "#/components/schemas/DocumentType"
-          description: Document type
         current_published_major:
           type:
             - integer
@@ -5266,6 +5262,7 @@ components:
         - major
         - minor
         - classification
+        - document_type
         - content
         - changelog
         - status
@@ -5293,6 +5290,9 @@ components:
         classification:
           $ref: "#/components/schemas/DocumentClassification"
           description: Document classification
+        document_type:
+          $ref: "#/components/schemas/DocumentType"
+          description: Document type
         content:
           type: string
           description: Document content
@@ -5482,9 +5482,6 @@ components:
         title:
           type: string
           description: Document title
-        document_type:
-          $ref: "#/components/schemas/DocumentType"
-          description: Document type
         trust_center_visibility:
           $ref: "#/components/schemas/TrustCenterVisibility"
           description: Trust center visibility
@@ -5613,6 +5610,9 @@ components:
         classification:
           $ref: "#/components/schemas/DocumentClassification"
           description: Document classification
+        document_type:
+          $ref: "#/components/schemas/DocumentType"
+          description: Document type
 
     UpdateDocumentVersionOutput:
       type: object

pkg/server/api/mcp/v1/types/document.go

@@ -24,7 +24,6 @@ func NewDocument(d *coredata.Document) *Document {
 		ID:                    d.ID,
 		OrganizationID:        d.OrganizationID,
 		Title:                 d.Title,
-		DocumentType:          d.DocumentType,
 		CurrentPublishedMajor: d.CurrentPublishedMajor,
 		CurrentPublishedMinor: d.CurrentPublishedMinor,
 		TrustCenterVisibility: d.TrustCenterVisibility,
@@ -87,6 +86,7 @@ func NewDocumentVersion(dv *coredata.DocumentVersion) *DocumentVersion {
 		Major:          dv.Major,
 		Minor:          dv.Minor,
 		Classification: dv.Classification,
+		DocumentType:   dv.DocumentType,
 		Content:        dv.Content,
 		Changelog:      dv.Changelog,
 		Status:         dv.Status,