Add band and venue follows with concert diary

db/migrations/13_follows_and_diary.sql

@@ -0,0 +1,25 @@
+CREATE TABLE IF NOT EXISTS followed_bands (
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    band_key VARCHAR(255) NOT NULL,
+    display_name VARCHAR(255) NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (user_id, band_key)
+);
+
+CREATE TABLE IF NOT EXISTS followed_venues (
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    venue_id INTEGER NOT NULL REFERENCES venues(id) ON DELETE CASCADE,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (user_id, venue_id)
+);
+
+CREATE TABLE IF NOT EXISTS concert_diary (
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    concert_id INTEGER NOT NULL REFERENCES concerts(id) ON DELETE CASCADE,
+    rating SMALLINT NOT NULL CHECK (rating BETWEEN 1 AND 5),
+    favorite_song VARCHAR(255),
+    notes TEXT,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    PRIMARY KEY (user_id, concert_id)
+);