add migrations folder

migrations/2026-04-11-123407-0000_file/up.sql

@@ -0,0 +1,11 @@
+-- Your SQL goes here
+
+CREATE TABLE "file" (
+  "id" bigserial PRIMARY KEY,
+  "created_at" timestamp default current_timestamp NOT NULL,
+  "downloads" bigint default 0 NOT NULL,
+  "filename" varchar(255) NOT NULL,
+  "file_size" bigint NOT NULL,
+  "stored_filename" varchar(30) UNIQUE NOT NULL,
+  "deleted" bool default false NOT NULL
+)