add alembic and store metrics at db

alembic/versions/4000ffc08875_autogenerate_test.py

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+"""autogenerate test
+
+Revision ID: 4000ffc08875
+Revises: ec51bfd7f8fe
+Create Date: 2026-02-10 11:22:01.824142
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '4000ffc08875'
+down_revision: Union[str, Sequence[str], None] = 'ec51bfd7f8fe'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('label_usage_stats',
+    sa.Column('label', sa.String(), nullable=False),
+    sa.Column('last_used', sa.Integer(), nullable=False),
+    sa.Column('used_count', sa.Integer(), nullable=True),
+    sa.PrimaryKeyConstraint('label')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('label_usage_stats')
+    # ### end Alembic commands ###

alembic/versions/ec51bfd7f8fe_initial.py

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+"""initial
+
+Revision ID: ec51bfd7f8fe
+Revises: 
+Create Date: 2026-02-10 11:10:12.415722
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'ec51bfd7f8fe'
+down_revision: Union[str, Sequence[str], None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    pass
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    pass