Fix: markdown table double extraction in parser (#13892)

### What problem does this PR solve?

Fixes markdown tables being parsed twice (once as markdown and again as
generated HTML), which caused duplicate table chunks in the chunk list
UI.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

deepdoc/parser/markdown_parser.py

@@ -56,7 +56,7 @@ class RAGFlowMarkdownParser:
             """,
                 re.VERBOSE,
             )
-            working_text = replace_tables_with_rendered_html(border_table_pattern, tables)
+            working_text = replace_tables_with_rendered_html(border_table_pattern, tables, render=separate_tables)
 
             # Borderless Markdown table
             no_border_table_pattern = re.compile(
@@ -68,7 +68,7 @@ class RAGFlowMarkdownParser:
                 """,
                 re.VERBOSE,
             )
-            working_text = replace_tables_with_rendered_html(no_border_table_pattern, tables)
+            working_text = replace_tables_with_rendered_html(no_border_table_pattern, tables, render=separate_tables)
 
         # Replace any TAGS e.g. <table ...> to <table>
         TAGS = ["table", "td", "tr", "th", "tbody", "thead", "div"]

test/testcases/test_sdk_api/test_chunk_management_within_dataset/conftest.py

@@ -15,7 +15,6 @@
 #
 
 
-from time import sleep
 
 import pytest
 from common import batch_add_chunks, delete_all_chunks
@@ -32,6 +31,10 @@ def condition(_dataset: DataSet):
             return False
     return True
 
+@wait_for(30, 1, "Chunk indexing timeout")
+def chunks_visible(_document: Document, _chunk_ids: list[str]):
+    visible_ids = {chunk.id for chunk in _document.list_chunks(page_size=1000)}
+    return set(_chunk_ids).issubset(visible_ids)
 
 @pytest.fixture(scope="function")
 def add_chunks_func(request: FixtureRequest, add_document: tuple[DataSet, Document]) -> tuple[DataSet, Document, list[Chunk]]:
@@ -47,6 +50,5 @@ def add_chunks_func(request: FixtureRequest, add_document: tuple[DataSet, Docume
     dataset.async_parse_documents([document.id])
     condition(dataset)
     chunks = batch_add_chunks(document, 4)
-    # issues/6487
-    sleep(1)
+    chunks_visible(document, [chunk.id for chunk in chunks])
     return dataset, document, chunks