05/19 Enhance codes 2

migrations/versions/i9j0k1l2m3n4_add_expires_at_to_shared_items.py

@@ -0,0 +1,33 @@
+"""add expires_at to shared_items
+
+Revision ID: i9j0k1l2m3n4
+Revises: h8i9j0k1l2m3
+Create Date: 2026-05-19 00:00:00.000000
+
+Adds an optional expiry timestamp to shared items.
+- NULL  = share never expires (backwards compatible with existing rows)
+- value = share is considered expired after this datetime
+
+Expired unaccepted shares are filtered from the recipient's inbox.
+Expired accepted shares remain visible (data already accepted into vault).
+The APScheduler cleanup job deletes expired unaccepted shares nightly.
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = 'i9j0k1l2m3n4'
+down_revision = 'h8i9j0k1l2m3'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.add_column(
+        'shared_items',
+        sa.Column('expires_at', sa.DateTime, nullable=True),
+    )
+
+
+def downgrade():
+    op.drop_column('shared_items', 'expires_at')