Refactor document handling and update Milvus collection settings

- Removed multiple failed document entries from `documents.json`.
- Added a new document entry with updated metadata and changed the index name to `regulations_dense_1024_v2`.
- Updated architecture documentation to reflect changes in the Milvus collection name.
- Adjusted requirements by removing the sqlalchemy dependency.
- Modified test cases to align with new document structure and naming conventions.
- Introduced a new test file for Milvus vector index runtime recovery and error handling.
- Updated assertions in various test files to ensure compatibility with the new schema.

backend/app/application/knowledge/services.py

@@ -29,11 +29,16 @@ def _reciprocal_rank_fusion(
         RetrievedChunk(
             chunk_id=chunk_map[ck].chunk_id,
             doc_id=chunk_map[ck].doc_id,
-            doc_name=chunk_map[ck].doc_name,
-            content=chunk_map[ck].content,
+            doc_title=chunk_map[ck].doc_title,
+            text=chunk_map[ck].text,
             score=scores[ck],
+            chunk_type=chunk_map[ck].chunk_type,
             section_title=chunk_map[ck].section_title,
-            page_number=chunk_map[ck].page_number,
+            page_start=chunk_map[ck].page_start,
+            page_end=chunk_map[ck].page_end,
+            section_level=chunk_map[ck].section_level,
+            chunk_index=chunk_map[ck].chunk_index,
+            piece_index=chunk_map[ck].piece_index,
             metadata=chunk_map[ck].metadata,
         )
         for ck in sorted_keys