Add supervisor with backoff restarts

default.nix

@@ -1,5 +1,6 @@
-{ mkDerivation, aeson, async, base, bytestring, hspec, lens
-, lens-aeson, lib, network, stm, text, time, websockets
+{ mkDerivation, aeson, annotated-exception, async, base, bytestring
+, hedgehog, hspec, hspec-hedgehog, lens, lens-aeson, lib, network
+, stm, text, time, websockets
 }:
 mkDerivation {
   pname = "home-assistant-controller";
@@ -8,11 +9,14 @@ mkDerivation {
   isLibrary = true;
   isExecutable = true;
   libraryHaskellDepends = [
-    aeson async base bytestring lens lens-aeson network stm text time
-    websockets
+    aeson annotated-exception async base bytestring lens lens-aeson
+    network stm text time websockets
   ];
   executableHaskellDepends = [ base ];
-  testHaskellDepends = [ aeson async base hspec stm text ];
+  testHaskellDepends = [
+    aeson annotated-exception async base hedgehog hspec hspec-hedgehog
+    stm text time
+  ];
   license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
   mainProgram = "home-assistant-controller";
 }