feat: add PGP encryption utilities and apply automatic decryption to user schema

Introduced centralized PGP encryption utilities and updated the `users` schema to enable automatic decryption for sensitive fields like `email` and `twoFactorSecret`.

backend/src/database/schemas/users.ts

@@ -1,6 +1,6 @@
+import { SQL, sql } from "drizzle-orm";
 import {
 	boolean,
-	customType,
 	index,
 	pgEnum,
 	pgTable,
@@ -8,13 +8,7 @@ import {
 	uuid,
 	varchar,
 } from "drizzle-orm/pg-core";
-
-// Type personnalisé pour les données chiffrées PGP (stockées en bytea dans Postgres)
-const pgpEncrypted = customType<{ data: string; driverData: string }>({
-	dataType() {
-		return "bytea";
-	},
-});
+import { pgpEncrypted, withAutomaticPgpDecrypt } from "./pgp";
 
 export const userStatus = pgEnum("user_status", [
 	"active",
@@ -65,5 +59,9 @@ export const users = pgTable(
 	}),
 );
 
+// Application du déchiffrement automatique pour les colonnes PGP
+withAutomaticPgpDecrypt(users.email);
+withAutomaticPgpDecrypt(users.twoFactorSecret);
+
 export type UserInDb = typeof users.$inferSelect;
 export type NewUserInDb = typeof users.$inferInsert;