Add possibility for signed firmware updates

backend/alembic/versions/20250323_506cc8d086c9-add_signature_fields_to_firmware_update_.py

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+"""Add signature fields to firmware_update table
+
+Revision ID: 506cc8d086c9
+Revises: 00edfb13e611
+Create Date: 2025-03-23 14:49:42.662564+00:00
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '506cc8d086c9'
+down_revision: Union[str, None] = '00edfb13e611'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('firmware_updates', sa.Column('signing_certificate', sa.Text(), nullable=True))
+    op.add_column('firmware_updates', sa.Column('signature', sa.String(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('firmware_updates', 'signature')
+    op.drop_column('firmware_updates', 'signing_certificate')
+    # ### end Alembic commands ###