initial commit after split

alembic/versions/c2d3e4f5a6b7_audit_pagination_indexes.py

@@ -0,0 +1,42 @@
+"""add composite indexes for paginated audit queries
+
+Revision ID: c2d3e4f5a6b7
+Revises: b1c2d3e4f5a6
+Create Date: 2026-06-15 17:30:00.000000
+"""
+from __future__ import annotations
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "c2d3e4f5a6b7"
+down_revision = "b1c2d3e4f5a6"
+branch_labels = None
+depends_on = None
+
+INDEXES: tuple[tuple[str, list[str]], ...] = (
+    ("ix_audit_log_scope_created_at", ["scope", "created_at"]),
+    ("ix_audit_log_tenant_scope_created_at", ["tenant_id", "scope", "created_at"]),
+)
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    inspector = sa.inspect(bind)
+    if "audit_log" not in inspector.get_table_names():
+        return
+    existing = {index["name"] for index in inspector.get_indexes("audit_log")}
+    for name, columns in INDEXES:
+        if name not in existing:
+            op.create_index(name, "audit_log", columns)
+
+
+def downgrade() -> None:
+    bind = op.get_bind()
+    inspector = sa.inspect(bind)
+    if "audit_log" not in inspector.get_table_names():
+        return
+    existing = {index["name"] for index in inspector.get_indexes("audit_log")}
+    for name, _columns in reversed(INDEXES):
+        if name in existing:
+            op.drop_index(name, table_name="audit_log")