refactor: add server-side validation schema for events (#4622)

* refactor: move files to subfolder

* refactor: schema for events.list

* refactor: update nullable fields in Event model

* fix: event actor not nullable

* fix: team not nullable

server/routes/api/events/schema.ts

@@ -0,0 +1,32 @@
+import { z } from "zod";
+
+export const EventsListSchema = z.object({
+  /** Id of the user who performed the action */
+  actorId: z.string().uuid().optional(),
+
+  /** Id of the document to filter the events for */
+  documentId: z.string().uuid().optional(),
+
+  /** Id of the collection to filter the events for */
+  collectionId: z.string().uuid().optional(),
+
+  /** Whether to include audit events */
+  auditLog: z.boolean().default(false),
+
+  /** Name of the event to retrieve */
+  name: z.string().optional(),
+
+  /** The attribute to sort the events by */
+  sort: z
+    .string()
+    .refine((val) => ["name", "createdAt"].includes(val))
+    .default("createdAt"),
+
+  /** The direction to sort the events */
+  direction: z
+    .string()
+    .optional()
+    .transform((val) => (val !== "ASC" ? "DESC" : val)),
+});
+
+export type EventsListReq = z.infer<typeof EventsListSchema>;