* fix: crypto subtype not persisted by permitting :subtype in CryptosController
* Backfill crypto subtype for existig accounts so Trades API works
* fix: backfill only unlinked cryptos; use raw SQL in migration; deterministic redirect in test
* Update schema.rb for BackfillcryptoSubtypeForTrades migration
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Signed-off-by: dataCenter430 <161712630+dataCenter430@users.noreply.github.com>