End to end encrypted attachment upload and streaming

prisma/migrations/20260116133849_attachment_size/migration.sql

@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - Added the required column `size` to the `Attachment` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- AlterTable
+ALTER TABLE "Attachment" ADD COLUMN     "size" BIGINT NOT NULL;