[books] Move book metadata into the log field

vrobbler/apps/scrobbles/migrations/0057_alter_scrobble_log.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.2.13 on 2024-08-06 15:27
+
+from django.db import migrations, models
+import scrobbles.dataclasses
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("scrobbles", "0056_scrobble_life_event_alter_scrobble_media_type"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="scrobble",
+            name="log",
+            field=models.JSONField(
+                blank=True,
+                decoder=scrobbles.dataclasses.ScrobbleMetadataDecoder,
+                encoder=scrobbles.dataclasses.ScrobbleMetadataEncoder,
+                null=True,
+            ),
+        ),
+    ]