perf(workflow): batch revision reads and add bounded histories

tests/test_migrations.py

@@ -29,7 +29,7 @@ class WorkflowMigrationTests(unittest.TestCase):
             try:
                 with engine.connect() as connection:
                     self.assertIn(
-                        "8d5a2f7c1b4e",
+                        "9e6b3f8a2c7d",
                         set(MigrationContext.configure(connection).get_current_heads()),
                     )
                     self.assertEqual(
@@ -75,6 +75,18 @@ class WorkflowMigrationTests(unittest.TestCase):
                         )
                     }
                     self.assertIn("start_origin", instance_columns)
+                    indexes = {
+                        item["name"]: item["column_names"]
+                        for item in inspect(connection).get_indexes("workflow_instances")
+                    }
+                    self.assertEqual(
+                        ["tenant_id", "created_at", "id"],
+                        indexes["ix_workflow_instances_tenant_created_id"],
+                    )
+                    self.assertEqual(
+                        ["tenant_id", "definition_id", "created_at", "id"],
+                        indexes["ix_workflow_instances_tenant_definition_created_id"],
+                    )
                     definition_columns = {
                         item["name"]
                         for item in inspect(connection).get_columns(
@@ -107,6 +119,7 @@ class WorkflowMigrationTests(unittest.TestCase):
                         "b2e4f6a8c0d1_",
                         "e4a1f8c2d7b6_",
                         "8d5a2f7c1b4e_",
+                        "9e6b3f8a2c7d_",
                     )
                 ):
                     continue
@@ -151,7 +164,7 @@ class WorkflowMigrationTests(unittest.TestCase):
                 manifest_factories=(get_manifest,),
             )
 
-            self.assertIn("8d5a2f7c1b4e", result.current_revision or "")
+            self.assertIn("9e6b3f8a2c7d", result.current_revision or "")
             engine = create_engine(url)
             try:
                 upgraded_tables = set(inspect(engine).get_table_names())
@@ -187,6 +200,8 @@ class WorkflowMigrationTests(unittest.TestCase):
             try:
                 with engine.begin() as connection:
                     for index_name in (
+                        "ix_workflow_instances_tenant_created_id",
+                        "ix_workflow_instances_tenant_definition_created_id",
                         "ix_workflow_instance_steps_work_assignment",
                         "ix_workflow_instance_steps_work_due_at",
                         "ix_workflow_instance_steps_work_assignment_id",
@@ -220,7 +235,7 @@ class WorkflowMigrationTests(unittest.TestCase):
                     connection.execute(
                         text(
                             "UPDATE alembic_version SET version_num = "
-                            "'b2e4f6a8c0d1' WHERE version_num = '8d5a2f7c1b4e'"
+                            "'b2e4f6a8c0d1' WHERE version_num = '9e6b3f8a2c7d'"
                         )
                     )
             finally:
@@ -258,7 +273,7 @@ class WorkflowMigrationTests(unittest.TestCase):
                 )
                 with engine.connect() as connection:
                     self.assertIn(
-                        "8d5a2f7c1b4e",
+                        "9e6b3f8a2c7d",
                         set(MigrationContext.configure(connection).get_current_heads()),
                     )
             finally: