feat(surveys): add index for linked_insight_id

Author: adboio

posthog/migrations/0906_survey_linked_insight_index.py

@@ -0,0 +1,22 @@
+# Generated by Django 4.2.26 on 2025-11-18 16:03
+
+from django.db import migrations
+
+
+# see 0415_pluginconfig_match_action.py
+class Migration(migrations.Migration):
+    atomic = False  # Added to support concurrent index creation
+    dependencies = [
+        ("posthog", "0905_survey_add_linked_insight"),
+    ]
+
+    operations = [
+        migrations.RunSQL(
+            """
+            CREATE INDEX CONCURRENTLY IF NOT EXISTS "posthog_survey_linked_insight_id_586524f3" ON "posthog_survey" ("linked_insight_id");
+            """,
+            reverse_sql="""
+            DROP INDEX IF EXISTS "posthog_survey_linked_insight_id_586524f3";
+            """,
+        ),
+    ]