feat: initial shared library extraction

Contains shared infrastructure for all coop services:
- shared/ (factory, urls, user_loader, context, internal_api, jinja_setup)
- models/ (User, Order, Calendar, Ticket, Product, Ghost CMS)
- db/ (SQLAlchemy async session, base)
- suma_browser/app/ (csrf, middleware, errors, authz, redis_cacher, payments, filters, utils)
- suma_browser/templates/ (shared base layouts, macros, error pages)
- static/ (CSS, JS, fonts, images)
- alembic/ (database migrations)
- config/ (app-config.yaml)
- editor/ (Lexical editor Node.js build)
- requirements.txt

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

alembic/versions/f6d4a1b2c3e7_add_tickets_table.py

@@ -0,0 +1,47 @@
+"""add tickets table
+
+Revision ID: f6d4a1b2c3e7
+Revises: e5c3f9a2b1d6
+Create Date: 2026-02-09
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = 'f6d4a1b2c3e7'
+down_revision = 'e5c3f9a2b1d6'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        'tickets',
+        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column('entry_id', sa.Integer(), sa.ForeignKey('calendar_entries.id', ondelete='CASCADE'), nullable=False),
+        sa.Column('ticket_type_id', sa.Integer(), sa.ForeignKey('ticket_types.id', ondelete='SET NULL'), nullable=True),
+        sa.Column('user_id', sa.Integer(), sa.ForeignKey('users.id'), nullable=True),
+        sa.Column('session_id', sa.String(64), nullable=True),
+        sa.Column('order_id', sa.Integer(), sa.ForeignKey('orders.id', ondelete='SET NULL'), nullable=True),
+        sa.Column('code', sa.String(64), unique=True, nullable=False),
+        sa.Column('state', sa.String(20), nullable=False, server_default=sa.text("'reserved'")),
+        sa.Column('created_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column('checked_in_at', sa.DateTime(timezone=True), nullable=True),
+    )
+    op.create_index('ix_tickets_entry_id', 'tickets', ['entry_id'])
+    op.create_index('ix_tickets_ticket_type_id', 'tickets', ['ticket_type_id'])
+    op.create_index('ix_tickets_user_id', 'tickets', ['user_id'])
+    op.create_index('ix_tickets_session_id', 'tickets', ['session_id'])
+    op.create_index('ix_tickets_order_id', 'tickets', ['order_id'])
+    op.create_index('ix_tickets_code', 'tickets', ['code'], unique=True)
+    op.create_index('ix_tickets_state', 'tickets', ['state'])
+
+
+def downgrade() -> None:
+    op.drop_index('ix_tickets_state', 'tickets')
+    op.drop_index('ix_tickets_code', 'tickets')
+    op.drop_index('ix_tickets_order_id', 'tickets')
+    op.drop_index('ix_tickets_session_id', 'tickets')
+    op.drop_index('ix_tickets_user_id', 'tickets')
+    op.drop_index('ix_tickets_ticket_type_id', 'tickets')
+    op.drop_index('ix_tickets_entry_id', 'tickets')
+    op.drop_table('tickets')