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Fixes #14159 ## Problem The `put()`, `get()`, `rm()`, and `obj_exist()` methods in both `azure_spn_conn.py` and `azure_sas_conn.py` ignore the `bucket` parameter entirely, storing all files flat using only the filename. This causes files from different datasets to overwrite each other when they share the same filename. By contrast, the MinIO and S3 implementations correctly use the bucket (typically the knowledge base ID) as a path prefix, creating logical folder isolation like `{kb_id}/{filename}`. ## Solution Prepend the `bucket` parameter as a path prefix to all file operations in both Azure storage implementations: - `azure_spn_conn.py`: `create_file`, `delete_file`, `get_file_client` now use `f"{bucket}/{fnm}"` - `azure_sas_conn.py`: `upload_blob`, `delete_blob`, `download_blob`, `get_blob_client` now use `f"{bucket}/{fnm}"` This matches the behavior of all other storage backends (MinIO, S3) and prevents filename collisions across knowledge bases. ## Testing - Verified the fix aligns with how MinIO/S3 connectors handle the bucket parameter - The `health()` method is left unchanged as it uses a fixed test path for connectivity checks only Co-authored-by: octo-patch <octo-patch@github.com> Co-authored-by: Jin Hai <haijin.chn@gmail.com>