add caching to prepstmts for slick

src/main/resources/application.conf

@@ -28,6 +28,9 @@ database = {
   maxLifetime = 5 minutes
   maximumPoolSize = 10
   leakDetectionThreshold = 2000
+  properties.cachePrepStmts = true
+  properties.prepStmtCacheSize = 20000
+  properties.prepStmtCacheSqlLimit = 100000
 }
 
 http {