Queries removed from cache can't be re-stored through the API

[jc-harrison]

Problem
The FlowMachine server only calls store_async on a query object if no query info lookup exists in redis, but if a query has been previously stored and removed from the cache then it will have a query info lookup but will still need to be stored again.

Solution
The server should always call store_async - this is safe even if the query is already running or in cache.

[greenape]

Safe but slow - preferable would be that the Redis cache either reports the query as unknown once it has been removed from cache, or we use the Redis cache data to only create-and-trigger if necessary.