perf: Postgres storage tuning for app_attest hot tables

alembic/versions/b3ea148a6d0b_tune_autovacuum_and_fillfactor_on_app_.py

@@ -0,0 +1,71 @@
+"""Postgres storage tuning for app_attest hot tables
+
+Revision ID: b3ea148a6d0b
+Revises: 919c4d382c42
+Create Date: 2026-07-27
+
+"""
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "b3ea148a6d0b"
+down_revision = "919c4d382c42"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.execute(
+        """
+        ALTER TABLE challenges SET (
+            autovacuum_vacuum_scale_factor = 0.05,
+            autovacuum_vacuum_cost_limit = 2000
+        )
+        """
+    )
+    op.execute(
+        """
+        ALTER TABLE public_keys SET (
+            fillfactor = 85,
+            autovacuum_vacuum_scale_factor = 0.05
+        )
+        """
+    )
+    op.execute(
+        """
+        ALTER TABLE mlpa_user_capacity SET (
+            fillfactor = 70,
+            autovacuum_vacuum_scale_factor = 0.0,
+            autovacuum_vacuum_threshold = 1000
+        )
+        """
+    )
+
+
+def downgrade() -> None:
+    op.execute(
+        """
+        ALTER TABLE mlpa_user_capacity RESET (
+            fillfactor,
+            autovacuum_vacuum_scale_factor,
+            autovacuum_vacuum_threshold
+        )
+        """
+    )
+    op.execute(
+        """
+        ALTER TABLE public_keys RESET (
+            fillfactor,
+            autovacuum_vacuum_scale_factor
+        )
+        """
+    )
+    op.execute(
+        """
+        ALTER TABLE challenges RESET (
+            autovacuum_vacuum_scale_factor,
+            autovacuum_vacuum_cost_limit
+        )
+        """
+    )