langchain

569a3d96 - docs(langchain): add docstring for `_load_stuff_chain` (#32932)

docs(langchain): add docstring for `_load_stuff_chain` (#32932) **Description:** Add a docstring to `_load_stuff_chain` in `chains/summarize/` to explain the purpose of the `prompt` argument and document function parameters. This addresses an existing TODO in the codebase. **Issue:** N/A (documentation improvement only) **Dependencies:** None