Can put photo on couples

geneit_backend/migrations/2023-05-24-102711_create_users/up.sql

@@ -60,6 +60,7 @@ CREATE TABLE members (
 CREATE TABLE couples (
     wife integer NOT NULL REFERENCES members,
     husband integer NOT NULL REFERENCES members,
+    photo_id VARCHAR(255) NULL,
     wedding_year smallint NULL,
     wedding_month smallint NULL,
     wedding_day smallint NULL,

geneit_backend/src/schema.rs

@@ -4,6 +4,7 @@ diesel::table! {
     couples (wife, husband) {
         wife -> Int4,
         husband -> Int4,
+        photo_id -> Nullable<Varchar>,
         wedding_year -> Nullable<Int2>,
         wedding_month -> Nullable<Int2>,
         wedding_day -> Nullable<Int2>,