[antiguru]

The input handle currently mixes element and container input, forcing send_batch to finish its element builder to preserve FIFO order. This change makes Handle<T, C> accept complete containers without a builder. Consuming it with with_builder::<CB>() or with_default_builder() produces an element-only BufferedHandle<T, CB>. The wrapper retains the timestamp and attached streams while flushing buffered records on timestamp changes and drop.

Stream registration stays on the existing Input trait and accepts only Handle<T, C>. Callers attach streams with scope.input_from or scope.new_input before adding buffering. The redundant core new_input_with_builder method is removed, and both close methods explicitly drop the consumed handle. Examples, documentation, and the Vec adapter use the simplified construction order.

Workspace tests passed with incremental compilation disabled. Documentation tests passed with the existing capture example on port 8000 excluded. Input integration tests cover fan-out, registration boundaries, conversion, progress, and flushing. The documentation examples cover both shared containers and buffered element input.

Posted by Codex.