fix: use higher entropy invite tokens (#2558)

* fix: use higher entropy invite tokens

We currently use CUIDs for invite tokens, which are generated using
a pattern and are not cryptographically secure. This PR switches to
a higher entropy string generated with `nanoid`.

* Dedupe the invite emails in the application

apps/webapp/app/models/member.server.ts

@@ -1,5 +1,9 @@
-import { prisma } from "~/db.server";
+import { type Prisma, prisma } from "~/db.server";
 import { createEnvironment } from "./organization.server";
+import { customAlphabet } from "nanoid";
+
+const tokenValueLength = 40;
+const tokenGenerator = customAlphabet("123456789abcdefghijkmnopqrstuvwxyz", tokenValueLength);
 
 export async function getTeamMembersAndInvites({
   userId,
@@ -95,14 +99,19 @@ export async function inviteMembers({
     throw new Error("User does not have access to this organization");
   }
 
-  const created = await prisma.orgMemberInvite.createMany({
-    data: emails.map((email) => ({
-      email,
-      organizationId: org.id,
-      inviterId: userId,
-      role: "MEMBER",
-    })),
-    skipDuplicates: true,
+  const invites = [...new Set(emails)].map(
+    (email) =>
+      ({
+        email,
+        token: tokenGenerator(),
+        organizationId: org.id,
+        inviterId: userId,
+        role: "MEMBER",
+      } satisfies Prisma.OrgMemberInviteCreateManyInput)
+  );
+
+  await prisma.orgMemberInvite.createMany({
+    data: invites,
   });
 
   return await prisma.orgMemberInvite.findMany({