Create albums table

migrations/2024-02-06-150214_create_albums_table/down.sql

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+DROP TABLE album_artists;
+DROP TABLE albums;

migrations/2024-02-06-150214_create_albums_table/up.sql

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+CREATE TABLE albums (
+    id SERIAL PRIMARY KEY UNIQUE NOT NULL,
+    title VARCHAR NOT NULL,
+    release_date DATE
+);
+
+-- A table to store artists for each album
+-- Needed because an album can have multiple artists, but in Postgres we can't store an array of foreign keys
+CREATE TABLE album_artists (
+    album_id INTEGER REFERENCES albums(id) ON DELETE CASCADE NOT NULL,
+    artist_id INTEGER REFERENCES artists(id) ON DELETE CASCADE NULL,
+    PRIMARY KEY (album_id, artist_id)
+);