To start this is just a shell for the test, there's no checking logic
yet.. put it as `test_accounting.test_ib_account_with_duplicated_mktids()`.
The test is composed for now to be completely runtime-free using only
the offline txn-ledger / symcache / account loading APIs, ideally we
fill in the activated symbology-data-runtime cases once we figure a sane
way to handle incremental symcache updates for backends like IB..
To actually fill the test out with real checks we still need to,
- extract the problem account file from my ib.algopape into the test
harness data.
- pick some contracts with multiple fqmes despite a single bs_mktid and
ensure they're aggregated as a single `Position` as well as,
* ideally de-duplicating txns from the account file section for the
mkt..
* warning appropriately about greater-then-one fqme for the bs_mktid
and providing a way for the ledger re-writing to choose the
appropriate `<venue>` as the "primary" when the
data-symbology-runtime is up and possibly use it to incrementally
update the IB symcache and store offline for next use?
Tyler Goodlet