ref: represent missing workflow_engine indexes in code (#91882)

these are already present in production but due to the way the fields
were changed left behind the state of the indexes that are present

<!-- Describe your PR here. -->

Author: asottile-sentry

migrations_lockfile.txt

@@ -29,4 +29,4 @@ tempest: 0002_make_message_type_nullable
 
 uptime: 0042_extra_uptime_indexes
 
-workflow_engine: 0061_backfill_metric_alert_resolution_action_filters
+workflow_engine: 0062_workflow_engine_missing_indexes

src/sentry/workflow_engine/migrations/0062_workflow_engine_missing_indexes.py

@@ -0,0 +1,65 @@
+# Generated by Django 5.2.1 on 2025-05-19 17:39
+from django.db import migrations
+
+import sentry.db.models.fields.bounded
+from sentry.new_migrations.migrations import CheckedMigration
+
+
+class Migration(CheckedMigration):
+    # This flag is used to mark that a migration shouldn't be automatically run in production.
+    # This should only be used for operations where it's safe to run the migration after your
+    # code has deployed. So this should not be used for most operations that alter the schema
+    # of a table.
+    # Here are some things that make sense to mark as post deployment:
+    # - Large data migrations. Typically we want these to be run manually so that they can be
+    #   monitored and not block the deploy for a long period of time while they run.
+    # - Adding indexes to large tables. Since this can take a long time, we'd generally prefer to
+    #   run this outside deployments so that we don't block them. Note that while adding an index
+    #   is a schema change, it's completely safe to run the operation after the code has deployed.
+    # Once deployed, run these manually via: https://develop.sentry.dev/database-migrations/#migration-deployment
+
+    is_post_deployment = False
+
+    dependencies = [
+        ("workflow_engine", "0061_backfill_metric_alert_resolution_action_filters"),
+    ]
+
+    operations = [
+        migrations.SeparateDatabaseAndState(
+            state_operations=[
+                migrations.AlterField(
+                    model_name="actionalertruletriggeraction",
+                    name="alert_rule_trigger_action_id",
+                    field=sentry.db.models.fields.bounded.BoundedBigIntegerField(db_index=True),
+                ),
+                migrations.AlterField(
+                    model_name="alertruledetector",
+                    name="alert_rule_id",
+                    field=sentry.db.models.fields.bounded.BoundedBigIntegerField(
+                        db_index=True, null=True
+                    ),
+                ),
+                migrations.AlterField(
+                    model_name="alertruledetector",
+                    name="rule_id",
+                    field=sentry.db.models.fields.bounded.BoundedBigIntegerField(
+                        db_index=True, null=True
+                    ),
+                ),
+                migrations.AlterField(
+                    model_name="alertruleworkflow",
+                    name="alert_rule_id",
+                    field=sentry.db.models.fields.bounded.BoundedBigIntegerField(
+                        db_index=True, null=True
+                    ),
+                ),
+                migrations.AlterField(
+                    model_name="alertruleworkflow",
+                    name="rule_id",
+                    field=sentry.db.models.fields.bounded.BoundedBigIntegerField(
+                        db_index=True, null=True
+                    ),
+                ),
+            ]
+        )
+    ]

src/sentry/workflow_engine/models/action_alertruletriggeraction.py

@@ -15,5 +15,5 @@ class ActionAlertRuleTriggerAction(DefaultFieldsModel):
 
     __relocation_scope__ = RelocationScope.Excluded
 
-    alert_rule_trigger_action_id = BoundedBigIntegerField()
+    alert_rule_trigger_action_id = BoundedBigIntegerField(db_index=True)
     action = FlexibleForeignKey("workflow_engine.Action")

src/sentry/workflow_engine/models/alertrule_detector.py

@@ -17,8 +17,8 @@ class AlertRuleDetector(DefaultFieldsModel):
 
     __relocation_scope__ = RelocationScope.Organization
 
-    alert_rule_id = BoundedBigIntegerField(null=True)
-    rule_id = BoundedBigIntegerField(null=True)
+    alert_rule_id = BoundedBigIntegerField(null=True, db_index=True)
+    rule_id = BoundedBigIntegerField(null=True, db_index=True)
     detector = FlexibleForeignKey("workflow_engine.Detector")
 
     class Meta:

src/sentry/workflow_engine/models/alertrule_workflow.py

@@ -18,8 +18,8 @@ class AlertRuleWorkflow(DefaultFieldsModel):
 
     __relocation_scope__ = RelocationScope.Organization
 
-    alert_rule_id = BoundedBigIntegerField(null=True)
-    rule_id = BoundedBigIntegerField(null=True)
+    alert_rule_id = BoundedBigIntegerField(null=True, db_index=True)
+    rule_id = BoundedBigIntegerField(null=True, db_index=True)
     workflow = FlexibleForeignKey("workflow_engine.Workflow")
 
     class Meta: