fix: Remove temperature for GPT-5 models (#8550)

Co-authored-by: Chandrapal Badshah <12944530+Chan9390@users.noreply.github.com>

api/src/backend/api/migrations/0046_lighthouse_gpt5.py

@@ -0,0 +1,33 @@
+# Generated by Django 5.1.10 on 2025-08-20 09:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("api", "0045_alter_scan_output_location"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="lighthouseconfiguration",
+            name="model",
+            field=models.CharField(
+                choices=[
+                    ("gpt-4o-2024-11-20", "GPT-4o v2024-11-20"),
+                    ("gpt-4o-2024-08-06", "GPT-4o v2024-08-06"),
+                    ("gpt-4o-2024-05-13", "GPT-4o v2024-05-13"),
+                    ("gpt-4o", "GPT-4o Default"),
+                    ("gpt-4o-mini-2024-07-18", "GPT-4o Mini v2024-07-18"),
+                    ("gpt-4o-mini", "GPT-4o Mini Default"),
+                    ("gpt-5-2025-08-07", "GPT-5 v2025-08-07"),
+                    ("gpt-5", "GPT-5 Default"),
+                    ("gpt-5-mini-2025-08-07", "GPT-5 Mini v2025-08-07"),
+                    ("gpt-5-mini", "GPT-5 Mini Default"),
+                ],
+                default="gpt-4o-2024-08-06",
+                help_text="Must be one of the supported model names",
+                max_length=50,
+            ),
+        ),
+    ]