feat: srp removal

backend/src/db/migrations/20250723220500_remove-srp.ts

@@ -0,0 +1,18 @@
+import { Knex } from "knex";
+
+import { TableName } from "../schemas";
+
+export async function up(knex: Knex): Promise<void> {
+  await knex.schema.alterTable(TableName.UserEncryptionKey, (table) => {
+    table.text("encryptedPrivateKey").nullable().alter();
+    table.text("publicKey").nullable().alter();
+    table.text("iv").nullable().alter();
+    table.text("tag").nullable().alter();
+    table.text("salt").nullable().alter();
+    table.text("verifier").nullable().alter();
+  });
+}
+
+export async function down(knex: Knex): Promise<void> {
+  // do nothing for now to avoid breaking down migrations
+}