* docs(backend): drop references to APIs that do not exist
PATH_EXAMPLES.md's upload example imports THREAD_DATA_BASE_DIR from
thread_data_middleware; the module exists but exports no such name, so the
snippet fails with ImportError as written. Resolve the same directory through
the accessor the middleware itself uses, get_paths().sandbox_uploads_dir(),
which yields the layout the file's own path table documents.
CONFIGURATION.md's Docker sandbox block lists `auto_start: true`. SandboxConfig
declares use/port/container_prefix/mounts/network but not auto_start, and the
provider is constructed as cls(**kwargs) from the caller of
get_sandbox_provider() rather than from config extras, so the key is accepted by
extra="allow" and then silently dropped. Remove the line from the example.
* docs(backend): resolve the uploads example through the owner-scoped bucket
get_paths().sandbox_uploads_dir(thread_id) without a user_id selects the legacy
threads/<id>/ bucket, but Gateway uploads land in
users/<user_id>/threads/<id>/user-data/uploads/, so the example imported cleanly
yet still raised FileNotFoundError for a normally uploaded file. Use
deerflow.uploads.manager.get_uploads_dir(), which resolves the effective user
and validates the thread id.
* docs(backend): show the real uploads path layout in every PATH_EXAMPLES demo
The remaining sections still documented the pre-isolation
threads/<thread_id>/ bucket and called `path` a backend-relative string, while
the upload and list APIs return an absolute path under
users/<user_id>/threads/<thread_id>/user-data/uploads/. Reproduced with
deerflow.uploads.manager.get_uploads_dir() and
uploads._list_uploaded_files_for_thread() against DEER_FLOW_HOME: the listed
path is /<home>/users/default/threads/abc123/user-data/uploads/report.pdf.
* docs(backend): clarify runtime home precedence
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
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