improve waiting times

LeStorage/ApiCallCollection.swift

@@ -226,12 +226,12 @@ actor ApiCallCollection<T: SyncedStorable>: SomeCallCollection {
     /// Wait for an exponentionnaly long time depending on the number of attemps
     fileprivate func _wait() async {
 
-        #if DEBUG
-        let seconds = self._attemptLoops
-        #else
-        let delay = pow(2, self._attemptLoops)
-        let seconds = NSDecimalNumber(decimal: delay).intValue
-        #endif
+        var seconds = self._attemptLoops
+        if self._attemptLoops > 5 {
+            let delay = pow(2, self._attemptLoops - 2) // starts at 16s
+            seconds = NSDecimalNumber(decimal: delay).intValue
+        }
+        
         Logger.log("\(T.resourceName()): wait for \(seconds) sec")
         do {
             try await Task.sleep(until: .now + .seconds(seconds))