fix(ebook): enhance EPUB ingestion with error handling and incrmental commits

python/ebook_search/ingest.py

@@ -91,6 +91,7 @@ def ingest_configured_paths(session: Session, config: EbookSearchConfig) -> int:
 
 def ingest_file(session: Session, path: Path, config: EbookSearchConfig) -> bool:
     """Ingest one EPUB file. Return True when the database changed."""
+    try:
         resolved_path = path.expanduser().resolve()
         logger.info("ebook_ingest_file_start path=%s", resolved_path)
         file_hash = sha256_file(resolved_path)
@@ -136,7 +137,7 @@ def ingest_file(session: Session, path: Path, config: EbookSearchConfig) -> bool
             session.flush()
             chunk_index = add_chapter_chunks(session, source, chapter, parsed_chapter, chunk_index, config)
 
-    session.flush()
+        session.commit()
         logger.info(
             "ebook_ingest_file_complete source_id=%s path=%s chapters=%s chunks=%s",
             source.id,
@@ -144,6 +145,10 @@ def ingest_file(session: Session, path: Path, config: EbookSearchConfig) -> bool
             len(parsed.chapters),
             chunk_index,
         )
+    except Exception:
+        logger.exception(f"ebook_ingest_file_error path={path}")
+        return False
+    else:
         return True