End to end encrypted attachment upload and streaming

prisma/migrations/20260116143226_attachment_msg/migration.sql

@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - Made the column `messageId` on table `Attachment` required. This step will fail if there are existing NULL values in that column.
+
+*/
+-- AlterTable
+ALTER TABLE "Attachment" ALTER COLUMN "messageId" SET NOT NULL;