feat(web): keep server duties and PATCH with hydrate ETag

Retain ledger author/reviewer/approver, fail-closed unknown users to
viewer, and send the opened revision ETag instead of a fresh GET.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/api/projectDocuments.ts

@@ -17,6 +17,12 @@ export type WorkflowDocumentSummary = {
   lease_holder_id?: string;
   lease_expires_at?: string;
   lease_heartbeat_at?: string;
+  author_id?: number;
+  author_name?: string;
+  reviewer_id?: number;
+  reviewer_name?: string;
+  approver_id?: number;
+  approver_name?: string;
 };
 
 export type ControlledDocumentContent = {