feat(chat): add metadata field to ChatMessage

- Added JSONField 'metadata' to ChatMessage model.
- Updated migration to reflect changes.

apps/chat/migrations/0002_chatmessage_metadata.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.1.8 on 2025-08-06 10:55
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('chat', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='chatmessage',
+            name='metadata',
+            field=models.JSONField(blank=True, null=True),
+        ),
+    ]

apps/chat/models.py

@@ -87,7 +87,7 @@ class ChatMessage(models.Model):
         null=True
     )
     is_read = models.BooleanField(default=False, verbose_name="Is Read")
-
+    metadata = models.JSONField(blank=True, null=True)
     sent_at = models.DateTimeField(auto_now_add=True, verbose_name="Sent At")        
     updated_at = models.DateTimeField(auto_now=True, verbose_name="Updated At")
     deleted_at = models.DateTimeField(null=True, blank=True, verbose_name="Deleted At")