Add glue layer support: MenuNode templates, factory registration, migration

- Templates: item.post.X → item.X (MenuNode has label/slug/feature_image directly)
- factory.py: add glue.models to import loop + register_glue_handlers() at startup
- alembic env.py: add glue.models to import loop
- New migration: container_relations + menu_nodes tables with backfill from existing data

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

alembic/env.py

@@ -19,7 +19,7 @@ from shared.db.base import Base
 
 # Import ALL models so Base.metadata sees every table
 import shared.models  # noqa: F401  User, KV, MagicLink, MenuItem, Ghost*
-for _mod in ("blog.models", "market.models", "cart.models", "events.models"):
+for _mod in ("blog.models", "market.models", "cart.models", "events.models", "glue.models"):
     try:
         __import__(_mod)
     except ImportError:

alembic/versions/i9g7d3e5f6_add_glue_layer_tables.py

@@ -0,0 +1,98 @@
+"""add glue layer tables (container_relations + menu_nodes)
+
+Revision ID: i9g7d3e5f6
+Revises: h8f6c2d4e5a9
+Create Date: 2026-02-11
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = 'i9g7d3e5f6'
+down_revision = 'h8f6c2d4e5a9'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # --- container_relations ---
+    op.create_table(
+        'container_relations',
+        sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column('parent_type', sa.String(32), nullable=False),
+        sa.Column('parent_id', sa.Integer(), nullable=False),
+        sa.Column('child_type', sa.String(32), nullable=False),
+        sa.Column('child_id', sa.Integer(), nullable=False),
+        sa.Column('sort_order', sa.Integer(), nullable=False, server_default='0'),
+        sa.Column('label', sa.String(255), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+        sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint(
+            'parent_type', 'parent_id', 'child_type', 'child_id',
+            name='uq_container_relations_parent_child',
+        ),
+    )
+    op.create_index('ix_container_relations_parent', 'container_relations', ['parent_type', 'parent_id'])
+    op.create_index('ix_container_relations_child', 'container_relations', ['child_type', 'child_id'])
+
+    # --- menu_nodes ---
+    op.create_table(
+        'menu_nodes',
+        sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column('container_type', sa.String(32), nullable=False),
+        sa.Column('container_id', sa.Integer(), nullable=False),
+        sa.Column('parent_id', sa.Integer(), nullable=True),
+        sa.Column('sort_order', sa.Integer(), nullable=False, server_default='0'),
+        sa.Column('depth', sa.Integer(), nullable=False, server_default='0'),
+        sa.Column('label', sa.String(255), nullable=False),
+        sa.Column('slug', sa.String(255), nullable=True),
+        sa.Column('href', sa.String(1024), nullable=True),
+        sa.Column('icon', sa.String(64), nullable=True),
+        sa.Column('feature_image', sa.Text(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.text('now()'), nullable=False),
+        sa.Column('deleted_at', sa.DateTime(timezone=True), nullable=True),
+        sa.PrimaryKeyConstraint('id'),
+        sa.ForeignKeyConstraint(['parent_id'], ['menu_nodes.id'], ondelete='SET NULL'),
+    )
+    op.create_index('ix_menu_nodes_container', 'menu_nodes', ['container_type', 'container_id'])
+    op.create_index('ix_menu_nodes_parent_id', 'menu_nodes', ['parent_id'])
+
+    # --- Backfill container_relations from existing container-pattern tables ---
+    op.execute("""
+        INSERT INTO container_relations (parent_type, parent_id, child_type, child_id, sort_order)
+        SELECT 'page', container_id, 'calendar', id, 0
+        FROM calendars
+        WHERE deleted_at IS NULL AND container_type = 'page'
+    """)
+    op.execute("""
+        INSERT INTO container_relations (parent_type, parent_id, child_type, child_id, sort_order)
+        SELECT 'page', container_id, 'market', id, 0
+        FROM market_places
+        WHERE deleted_at IS NULL AND container_type = 'page'
+    """)
+    op.execute("""
+        INSERT INTO container_relations (parent_type, parent_id, child_type, child_id, sort_order)
+        SELECT 'page', container_id, 'page_config', id, 0
+        FROM page_configs
+        WHERE deleted_at IS NULL AND container_type = 'page'
+    """)
+
+    # --- Backfill menu_nodes from existing menu_items + posts ---
+    op.execute("""
+        INSERT INTO menu_nodes (container_type, container_id, label, slug, feature_image, sort_order)
+        SELECT 'page', mi.post_id, p.title, p.slug, p.feature_image, mi.sort_order
+        FROM menu_items mi
+        JOIN posts p ON mi.post_id = p.id
+        WHERE mi.deleted_at IS NULL
+    """)
+
+
+def downgrade() -> None:
+    op.drop_index('ix_menu_nodes_parent_id', table_name='menu_nodes')
+    op.drop_index('ix_menu_nodes_container', table_name='menu_nodes')
+    op.drop_table('menu_nodes')
+    op.drop_index('ix_container_relations_child', table_name='container_relations')
+    op.drop_index('ix_container_relations_parent', table_name='container_relations')
+    op.drop_table('container_relations')