## About the changes
This PR removes the feature flag `queryMissingTokens` that was fully
rolled out.
It introduces a new way of checking edgeValidTokens controlled by the
flag `checkEdgeValidTokensFromCache` that relies in the cached data but
hits the DB if needed.
The assumption is that most of the times edge will find tokens in the
cache, except for a few cases in which a new token is queried. From all
tokens we expect at most one to hit the DB and in this case querying a
single token should be better than querying all the tokens.
## About the changes
getAllActive from api-tokens store is the second most frequent query
To prevent starving our db connections, we can cache this data that
rarely changes and clear the cache when we see changes. Because we will
only clear changes in the node receiving the change we're only caching
the data for 1 minute.
This should give us some room to test if this solution will work
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Co-authored-by: Nuno Góis <github@nunogois.com>
Adding documentation for the edge endpoints. Also separating request and
response schema for our validate endpoint to make clear that we expect a
list of strings as input, but yield tokens as output.
---------
Co-authored-by: Gastón Fournier <gaston@getunleash.io>
Co-authored-by: Thomas Heartman <thomas@getunleash.ai>
