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416d55b3d6
Renames the stream's and projections' "private" producer-side methods to public names, since they are the intended call surface for anyone driving the stream (the pump, langgraph's forthcoming handler, tests). Removes ~36 `noqa: SLF001` suppressions along the way. On `_ProjectionBase`: - `_push` -> `push` - `_finish` -> `complete` - `_fail` -> `fail` - adds `done` / `error` read-only properties for sidekicks (iterator) - `SyncProjection.set_request_more(cb)` replaces direct `_request_more` assignment On `ChatModelStream`: - `_bind_pump` -> `bind_pump` - `_fail` -> `fail` - adds `output_message` property (non-blocking peek) - new `dispatch(event)` method replaces the module-level `dispatch_event` helper (kept as a thin deprecated wrapper for back-compat) The genuinely internal helpers (`_record_event`, `_push_*`, `_finish` on the stream, `_drain`, `_assemble_message`) stay private — they have one caller each, inside the class. Remaining SLF001 suppressions in this file are intentional `_AsyncProjectionIterator` coupling to its projection's `_deltas` and `_event`; annotated with a comment.