fix: resolve UDF extraction false positive rejection on real UDF content.xml files

src/controllers/document.controller.ts

@@ -490,9 +490,9 @@ export async function extractTextFromUploadedFile(file: { buffer: Buffer; mimety
               .trim();
 
             const cleaned = sanitizePostgresText(plainText);
-            // Akıllı filtreleme: content.xml, content.xmlPK gibi ZIP başlık isimlerini metin sanma
-            const isZipNoise = /^content\.xml/i.test(cleaned) || cleaned.includes('content.xmlPK') || cleaned.includes('documentproperties.xml');
-            if (cleaned.length > 5 && !cleaned.startsWith('PK') && !isZipNoise) {
+            // Sadece tek başına "content.xml" veya "content.xmlPK" olan kısa çöp dizgileri süz (Gerçek metinleri kesinlikle engelleme)
+            const isExactZipHeader = /^content\.xml(PK)?$/i.test(cleaned.trim()) && cleaned.length < 35;
+            if (cleaned.length > 5 && !cleaned.startsWith('PK') && !isExactZipHeader) {
               return cleaned;
             }
           }