feat: Migrate document parsing to Aliyun and update embedding configurations

- Updated LocalDocumentParser to include raw_layouts and artifact_prefix from settings.
- Added new documents with failure reasons and metadata to documents.json for better error tracking.
- Created a new documentation file detailing the Aliyun ingest implementation process.
- Updated RFC to reflect changes in the parsing backend and embedding dimensions.
- Modified tests to accommodate the new embedding dimension of 1024 and updated parser and chunk builder assertions.
- Verified migration configurations to ensure correct settings for embedding model and backend.

backend/app/api/routes/status.py

@@ -32,6 +32,10 @@ async def get_config():
         "embedding_dim": settings.embedding_dim,
         "embedding_base_url": settings.embedding_base_url,
         "milvus_collection": settings.milvus_collection,
+        "parser_backend": settings.parser_backend,
+        "chunk_backend": settings.chunk_backend,
+        "artifact_prefix": settings.document_parse_artifact_prefix,
+        "parser_failure_mode": settings.parser_failure_mode,
         "llm_provider": settings.llm_provider,
         "llm_model": settings.llm_model,
         "document_metadata_path": settings.document_metadata_path,