feat: applied model mixins

IdMixin used on every table with an ID index (no changes needed to db)

Timestamp and Deleted mixins applied to org and user tables.

ActivatedMixin added to users.

alembic/versions/2026-06-22_model_mixins.py

@@ -0,0 +1,44 @@
+"""model mixins
+
+Revision ID: 661202797ecd
+Revises: 869d48618a1c
+Create Date: 2026-06-22 13:29:39.689067
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '661202797ecd'
+down_revision: Union[str, Sequence[str], None] = '869d48618a1c'
+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.add_column('organisation', sa.Column('created_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()))
+    op.add_column('organisation', sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()))
+    op.add_column('organisation', sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True))
+    op.add_column('user', sa.Column('active', sa.Boolean(), nullable=False, server_default=sa.false()))
+    op.add_column('user', sa.Column('created_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()))
+    op.add_column('user', sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()))
+    op.add_column('user', sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('user', 'deleted_at')
+    op.drop_column('user', 'updated_at')
+    op.drop_column('user', 'created_at')
+    op.drop_column('user', 'active')
+    op.drop_column('organisation', 'deleted_at')
+    op.drop_column('organisation', 'updated_at')
+    op.drop_column('organisation', 'created_at')
+    # ### end Alembic commands ###