Add indexes and pagination to improve app performance

migrations/versions/8cfe56a1e597_add_reading_index_and_profile_updated_at.py

@@ -0,0 +1,38 @@
+"""Add reading index and profile updated_at
+
+Revision ID: 8cfe56a1e597
+Revises: 5e5a1b78b966
+Create Date: 2026-03-09 21:21:44.291659
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '8cfe56a1e597'
+down_revision = '5e5a1b78b966'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('profile', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('updated_at', sa.DateTime(), nullable=True))
+
+    with op.batch_alter_table('reading', schema=None) as batch_op:
+        batch_op.create_index('ix_reading_user_timestamp', ['user_id', 'timestamp'], unique=False)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('reading', schema=None) as batch_op:
+        batch_op.drop_index('ix_reading_user_timestamp')
+
+    with op.batch_alter_table('profile', schema=None) as batch_op:
+        batch_op.drop_column('updated_at')
+
+    # ### end Alembic commands ###