Extend the `col_sym_key` asset-type check in `start_backfill()`
to also exclude crypto-denominated futures (where `src` is
`'crypto_currency'` and `dst` is `'future'`) from the
`without_src=True` fqme path.
Also in `.brokers.binance` backend (it being the guilty culprit in the
discovery of this bug; and why i touched styling this code),
- reformat `make_sub()` fn sig to multiline style in
`.binance.feed`.
- add backtick around `dict` in `make_sub()` docstring.
- reformat `or` conditionals to multiline style in
`.binance.feed.get_mkt_info()`.
(this commit msg was generated in some part by [`claude-code`][claude-code-gh])
[claude-code-gh]: https://github.com/anthropics/claude-code
Gud Boi
31859e9d03