Automate diary entries and add photo galleries

db/migrations/18_diary_photo_gallery.sql

@@ -0,0 +1,16 @@
+CREATE TABLE IF NOT EXISTS concert_diary_photos (
+    id SERIAL PRIMARY KEY,
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    concert_id INTEGER NOT NULL REFERENCES concerts(id) ON DELETE CASCADE,
+    path TEXT NOT NULL UNIQUE,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_concert_diary_photos_entry
+ON concert_diary_photos(user_id, concert_id, created_at);
+
+INSERT INTO concert_diary_photos (user_id, concert_id, path)
+SELECT user_id, concert_id, photo_path
+FROM concert_diary
+WHERE photo_path IS NOT NULL
+ON CONFLICT (path) DO NOTHING;