fix: Add 10 domain limit per team (#3733)

* fix: Validate team domains are FQDN's
Add 10 domain limit per team
fix: Deletion of domains not happening within request lifecycle

* tests

* docs

server/models/validators/IsFQDN.ts

@@ -0,0 +1,17 @@
+import { isFQDN } from "class-validator";
+import { addAttributeOptions } from "sequelize-typescript";
+
+/**
+ * A decorator that validates that a string is a fully qualified domain name.
+ */
+export default function IsFQDN(target: any, propertyName: string) {
+  return addAttributeOptions(target, propertyName, {
+    validate: {
+      validDomain(value: string) {
+        if (!isFQDN(value)) {
+          throw new Error("Must be a fully qualified domain name");
+        }
+      },
+    },
+  });
+}