Rework logging (#3358)

Unified all log files into one.

### What problem does this PR solve?

Unified all log files into one.

### Type of change

- [x] Refactoring

rag/app/one.py

@@ -18,6 +18,7 @@ from deepdoc.parser.utils import get_text
 from rag.app import laws
 from rag.nlp import rag_tokenizer, tokenize
 from deepdoc.parser import PdfParser, ExcelParser, PlainParser, HtmlParser
+from api.utils.log_utils import logger
 
 
 class Pdf(PdfParser):
@@ -37,7 +38,7 @@ class Pdf(PdfParser):
         start = timer()
         self._layouts_rec(zoomin, drop=False)
         callback(0.63, "Layout analysis finished.")
-        print("layouts:", timer() - start)
+        logger.info("layouts cost: {}s".format(timer() - start))
         self._table_transformer_job(zoomin)
         callback(0.65, "Table analysis finished.")
         self._text_merge()