feat(core): add alembic migration for currencies table

alembic/versions/0007_currencies.py

@@ -0,0 +1,42 @@
+"""Create currencies table.
+
+Revision ID: 0007_currencies
+Revises: 0006_add_addresses
+Create Date: 2026-07-04
+"""
+
+from __future__ import annotations
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision: str = "0007_currencies"
+down_revision: Union[str, None] = "0006_add_addresses"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "currencies",
+        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
+        sa.Column("code", sa.String(3), nullable=False, unique=True),
+        sa.Column("name", sa.String(50), nullable=False),
+        sa.Column("symbol", sa.String(5), nullable=False),
+        sa.Column("is_default", sa.Boolean, nullable=False, server_default="false"),
+        sa.Column("tenant_id", postgresql.UUID(as_uuid=True), nullable=False, index=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.create_index("ix_currencies_tenant_code", "currencies", ["tenant_id", "code"])
+    op.create_index("ix_currencies_tenant_default", "currencies", ["tenant_id", "is_default"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_currencies_tenant_default", table_name="currencies")
+    op.drop_index("ix_currencies_tenant_code", table_name="currencies")
+    op.drop_table("currencies")