Improve EPUB restoration, book terminology and Calibre QA workflow

pipeline/03_assemble.py

@@ -7,6 +7,7 @@ from pathlib import Path
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 from src.assembly.backfiller import BackfillEngine
+from src.assembly.restoration_engine import RestorationEngine
 from src.assembly.builder import BilingualBuilder
 from src.translation.manifest_manager import ManifestManager
 from src.translation.llm_client import LLMClient
@@ -65,7 +66,11 @@ async def run_assemble(args):
         
         # Backfill
         logger.info(f"Backfilling translations (Mode: {args.mode})...")
-        backfiller = BackfillEngine(llm_client=llm_client)
+        await RestorationEngine(llm_client).restore_entries(manager.entries)
+        manager.save()
+        if any(e.translated_text and not e.translated_html for e in manager.entries):
+            raise ValueError("Format validation failed; inspect manifest")
+        backfiller = BackfillEngine()
         updated_structure = await backfiller.backfill(structure, manager.entries, mode=args.mode)
         
         if llm_client: