chore: Update SDK documentation (#2517)

Co-authored-by: marvin-context-protocol[bot] <225465937+marvin-context-protocol[bot]@users.noreply.github.com>

docs/python-sdk/fastmcp-cli-tasks.mdx

@@ -0,0 +1,41 @@
+---
+title: tasks
+sidebarTitle: tasks
+---
+
+# `fastmcp.cli.tasks`
+
+
+FastMCP tasks CLI for Docket task management.
+
+## Functions
+
+### `check_distributed_backend` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/cli/tasks.py#L22" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
+
+```python
+check_distributed_backend() -> None
+```
+
+
+Check if Docket is configured with a distributed backend.
+
+The CLI worker runs as a separate process, so it needs Redis/Valkey
+to coordinate with the main server process.
+
+**Raises:**
+- `SystemExit`: If using memory\:// URL
+
+
+### `worker` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/cli/tasks.py#L61" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
+
+```python
+worker(server_spec: Annotated[str | None, cyclopts.Parameter(help='Python file to run, optionally with :object suffix, or None to auto-detect fastmcp.json')] = None) -> None
+```
+
+
+Start an additional worker to process background tasks.
+
+Connects to your Docket backend and processes tasks in parallel with
+any other running workers. Configure via environment variables
+(FASTMCP_DOCKET_*).
+