feat: add events table to schema and update SQL migration script

Backend/drizzle/0000_certain_jocasta.sql

@@ -7,12 +7,4 @@ CREATE TABLE "users" (
 	CONSTRAINT "users_email_unique" UNIQUE("email")
 );
 
-CREATE TABLE "events" (
-	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
-	"title" varchar(255) NOT NULL,
-	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
-	"video_url" varchar(255) NOT NULL,
-	CONSTRAINT "events_url_unique" UNIQUE("url")
-)
-