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/old_versions/20251107_121500_add_labels_stickers.py

@@ -0,0 +1,52 @@
+"""add product labels and stickers
+
+Revision ID: 20251107_121500_add_labels_stickers
+Revises: 20251107_090500_snapshot_to_db
+Create Date: 2025-11-07T12:15:00.000000
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "20251107_121500_labels_stickers"
+down_revision = "20251107_090500_snapshot_to_db"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "product_labels",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("product_id", sa.Integer(), sa.ForeignKey("products.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("name", sa.String(length=255), nullable=False),
+    )
+    op.create_index("ix_product_labels_product_id", "product_labels", ["product_id"], unique=False)
+    op.create_index("ix_product_labels_name", "product_labels", ["name"], unique=False)
+    op.create_unique_constraint(
+        "uq_product_labels_product_name", "product_labels", ["product_id", "name"]
+    )
+
+    op.create_table(
+        "product_stickers",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("product_id", sa.Integer(), sa.ForeignKey("products.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("name", sa.String(length=255), nullable=False),
+    )
+    op.create_index("ix_product_stickers_product_id", "product_stickers", ["product_id"], unique=False)
+    op.create_index("ix_product_stickers_name", "product_stickers", ["name"], unique=False)
+    op.create_unique_constraint(
+        "uq_product_stickers_product_name", "product_stickers", ["product_id", "name"]
+    )
+
+
+def downgrade() -> None:
+    op.drop_constraint("uq_product_stickers_product_name", "product_stickers", type_="unique")
+    op.drop_index("ix_product_stickers_name", table_name="product_stickers")
+    op.drop_index("ix_product_stickers_product_id", table_name="product_stickers")
+    op.drop_table("product_stickers")
+
+    op.drop_constraint("uq_product_labels_product_name", "product_labels", type_="unique")
+    op.drop_index("ix_product_labels_name", table_name="product_labels")
+    op.drop_index("ix_product_labels_product_id", table_name="product_labels")
+    op.drop_table("product_labels")