tests: expanding concurrency tests with fast-check

This just adds some tests that hit the API with a bunch of concurrent operations with random order. This is to check for any db transaction errors.

Author: tegefaulkes

package-lock.json

@@ -83,6 +83,7 @@
     "ts-node": "^10.9.1",
     "tsconfig-paths": "^3.9.0",
     "typedoc": "^0.22.15",
-    "typescript": "^4.5.2"
+    "typescript": "^4.5.2",
+    "fast-check": "^3.0.1"
   }
 }