symbol case `KeyError` on 2nd sym loaded

[goodboy]

I've noticed this now both with kraken and binance backends. Error is something along the lines of:

Traceback (most recent call last):
  File "/home/goodboy/repos/tractor/tractor/_runtime.py", line 196, in _invoke
    res = await coro
  File "/home/goodboy/repos/piker/piker/data/feed.py", line 1140, in open_feed_bus
    await bus.nursery.start(
  File "/home/goodboy/.virtualenvs/piker310/lib/python3.10/site-packages/trio/_core/_run.py", line 1085, in start
    async with open_nursery() as old_nursery:
  File "/home/goodboy/.virtualenvs/piker310/lib/python3.10/site-packages/trio/_core/_run.py", line 850, in __aexit__
    raise combined_error_from_nursery
  File "/home/goodboy/repos/piker/piker/data/feed.py", line 966, in allocate_persistent_feed
    msg = init_msg[symstr]
KeyError: 'LTCEUR'

[4] > /home/goodboy/repos/piker/piker/data/feed.py(966)allocate_persistent_feed()
-> msg = init_msg[symstr]

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Explanation

seems to be either of:

• pikerd is running, connect a chart to a kraken with a symbol specc-ed on the CLI (say xbteur.kraken), connect another separate chart program to a binance sym (say btcusdt.binance), in the first chart try to search and load another kraken feed.
• the same setup but spawn the binance-only chart first

I can't tell yet if this is cex specific or not but does seem to be a discrepancy between the input symbol key from the search results to the lookup by the feed machinery to get sym info:

LTCEUR -> -> init_msg: dict contains lower case version of key.

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possible solution(s)

probably best one is keeping lowercase symbol keys throughout the data feed stuff and making sure that binance adheres to this in particular..