Change the stale-bar check in `.binance.feed` from `timeframe` to
`timeframe * 2` tolerance to avoid false-positive pauses when bars
are slightly delayed but still within acceptable bounds.
Styling,
- add walrus operator to capture `_time_step` for debugger
inspection.
- add comment explaining the debug purpose of this check.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code