[websockets] migrate to StmContainers.Set

gargantext.cabal

@@ -520,6 +520,7 @@ library
     , cryptohash ^>= 0.11.9
     , data-time-segment ^>= 0.1.0.0
     , deepseq ^>= 1.4.4.0
+    , deferred-folds >= 0.9.18 && < 0.10
     , directory ^>= 1.3.6.0
     , discrimination >= 0.5
     , ekg-core ^>= 0.1.1.7

src/Gargantext/Database/Admin/Types/Node.hs

@@ -63,7 +63,7 @@ class ResourceId a where
 -- whereas this one tracks only users.
 newtype UserId = UnsafeMkUserId { _UserId :: Int }
   deriving stock (Show, Eq, Ord, Generic)
-  deriving newtype (ToSchema, ToJSON, FromJSON, FromField, ToField)
+  deriving newtype (ToSchema, ToJSON, FromJSON, FromField, ToField, Hashable)
 
 -- The 'UserId' is isomprohic to an 'Int'.
 instance GQLType UserId where