fix: downgrade console.error to console.debug in DocumentHistoryTracker.push()

When onDidChangeVisibleTextEditors fires, deleteChain() calls push() on the
DocumentHistoryTracker for the previous request filepath. Because
onDidOpenTextDocument is currently disabled (pending PR continuedev#8364 merge),
documents are never pre-added via addDocument(), so push() always takes the
fallback path and logs a console.error on every editor switch.

The fallback in push() already handles this gracefully by calling
addDocument(), making the error log misleading noise. Downgrade it to
console.debug so it remains accessible for debugging without polluting the
Extension Host output.

Fixes continuedev#11919

Author: octo-patch

core/nextEdit/DocumentHistoryTracker.ts

@@ -61,7 +61,7 @@ export class DocumentHistoryTracker {
     const documentHistory = this.documentContentHistoryMap.get(documentPath);
 
     if (!astHistory || !documentHistory) {
-      console.error(`Document ${documentPath} not found in AST tracker`);
+      console.debug(`Document ${documentPath} not found in AST tracker, adding it`);
       this.addDocument(documentPath, documentContent, ast);
       return; // Early return - document was added with initial state
     }