the function uses the memcachedByClass mechanism, which was slightly refined as well to include the class within the memcached keys for added correctness
RESULTS:
Keys for memcached use their Binary representation!
This means that the following three are all interchangeable as a key:
newtype Foo1 = Foo1 { someInt1 :: Int } deriving newtype (Binary)
data Foo2 = Foo2 { someInt2 :: Int } deriving (Binary)
type Foo3 = Int
Therefore it is best to use $(memcachedHere) or $(memcachedByHere) if possible or add another type
NOTE: this was a crude surgery, removing everything ARC related; some dead code artifacts may have remained.
Especially check PrewarmCacheConf
Reason for removall: adding `memcachedInvalidateClass` was difficult to implement with ARC active; ARC was known to be problematic; removal was easier (see #2 2024-09-23)
