Decouple per-service Alembic migrations and fix cross-DB queries

Each service (blog, market, cart, events, federation, account) now owns
its own database schema with independent Alembic migrations. Removes the
monolithic shared/alembic/ that ran all migrations against a single DB.

- Add per-service alembic.ini, env.py, and 0001_initial.py migrations
- Add shared/db/alembic_env.py helper with table-name filtering
- Fix cross-DB FK in blog/models/snippet.py (users lives in db_account)
- Fix cart_impl.py cross-DB queries: fetch products and market_places
  via internal data endpoints instead of direct SQL joins
- Fix blog ghost_sync to fetch page_configs from cart via data endpoint
- Add products-by-ids and page-config-ensure data endpoints
- Update all entrypoint.sh to create own DB and run own migrations
- Cart now uses db_cart instead of db_market
- Add docker-compose.dev.yml, dev.sh for local development
- CI deploys both rose-ash swarm stack and rose-ash-dev compose stack
- Fix Quart namespace package crash (root_path in factory.py)

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

cart/alembic.ini

@@ -0,0 +1,35 @@
+[alembic]
+script_location = alembic
+sqlalchemy.url =
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s

cart/alembic/env.py

@@ -0,0 +1,14 @@
+from alembic import context
+from shared.db.alembic_env import run_alembic
+
+MODELS = [
+    "shared.models.market",       # CartItem lives here
+    "shared.models.order",
+    "shared.models.page_config",
+]
+
+TABLES = frozenset({
+    "cart_items", "orders", "order_items", "page_configs",
+})
+
+run_alembic(context.config, MODELS, TABLES)

cart/alembic/versions/0001_initial.py

@@ -0,0 +1,92 @@
+"""Initial cart tables
+
+Revision ID: cart_0001
+Revises: None
+Create Date: 2026-02-26
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "cart_0001"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def _table_exists(conn, name):
+    result = conn.execute(sa.text(
+        "SELECT 1 FROM information_schema.tables WHERE table_schema='public' AND table_name=:t"
+    ), {"t": name})
+    return result.scalar() is not None
+
+
+def upgrade():
+    if _table_exists(op.get_bind(), "orders"):
+        return
+
+    op.create_table(
+        "page_configs",
+        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
+        sa.Column("container_type", sa.String(32), nullable=False, server_default="page"),
+        sa.Column("container_id", sa.Integer, nullable=False),
+        sa.Column("features", sa.JSON, nullable=False, server_default="{}"),
+        sa.Column("sumup_merchant_code", sa.String(64), nullable=True),
+        sa.Column("sumup_api_key", sa.Text, nullable=True),
+        sa.Column("sumup_checkout_prefix", sa.String(64), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+    )
+
+    op.create_table(
+        "cart_items",
+        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
+        sa.Column("user_id", sa.Integer, nullable=True),
+        sa.Column("session_id", sa.String(128), nullable=True),
+        sa.Column("product_id", sa.Integer, nullable=False),
+        sa.Column("quantity", sa.Integer, nullable=False, server_default="1"),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("market_place_id", sa.Integer, nullable=True, index=True),
+        sa.Column("deleted_at", sa.DateTime(timezone=True), nullable=True),
+    )
+    op.create_index("ix_cart_items_user_product", "cart_items", ["user_id", "product_id"])
+    op.create_index("ix_cart_items_session_product", "cart_items", ["session_id", "product_id"])
+
+    op.create_table(
+        "orders",
+        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
+        sa.Column("user_id", sa.Integer, nullable=True),
+        sa.Column("session_id", sa.String(64), nullable=True, index=True),
+        sa.Column("page_config_id", sa.Integer, nullable=True, index=True),
+        sa.Column("status", sa.String(32), nullable=False, server_default="pending"),
+        sa.Column("currency", sa.String(16), nullable=False),
+        sa.Column("total_amount", sa.Numeric(12, 2), nullable=False),
+        sa.Column("description", sa.Text, nullable=True, index=True),
+        sa.Column("sumup_reference", sa.String(255), nullable=True, index=True),
+        sa.Column("sumup_checkout_id", sa.String(128), nullable=True, index=True),
+        sa.Column("sumup_status", sa.String(32), nullable=True),
+        sa.Column("sumup_hosted_url", sa.Text, nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+    )
+
+    op.create_table(
+        "order_items",
+        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
+        sa.Column("order_id", sa.Integer, sa.ForeignKey("orders.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("product_id", sa.Integer, nullable=False),
+        sa.Column("product_title", sa.String(512), nullable=True),
+        sa.Column("quantity", sa.Integer, nullable=False),
+        sa.Column("unit_price", sa.Numeric(12, 2), nullable=False),
+        sa.Column("currency", sa.String(16), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
+    )
+
+
+def downgrade():
+    op.drop_table("order_items")
+    op.drop_table("orders")
+    op.drop_table("cart_items")
+    op.drop_table("page_configs")

cart/bp/data/routes.py

@@ -42,4 +42,39 @@ def register() -> Blueprint:
 
     _handlers["cart-summary"] = _cart_summary
 
+    # --- page-config-ensure ---
+    async def _page_config_ensure():
+        """Get or create a PageConfig for a container_type + container_id."""
+        from sqlalchemy import select
+        from shared.models.page_config import PageConfig
+
+        container_type = request.args.get("container_type", "page")
+        container_id = request.args.get("container_id", type=int)
+        if container_id is None:
+            return {"error": "container_id required"}, 400
+
+        row = (await g.s.execute(
+            select(PageConfig).where(
+                PageConfig.container_type == container_type,
+                PageConfig.container_id == container_id,
+            )
+        )).scalar_one_or_none()
+
+        if row is None:
+            row = PageConfig(
+                container_type=container_type,
+                container_id=container_id,
+                features={},
+            )
+            g.s.add(row)
+            await g.s.flush()
+
+        return {
+            "id": row.id,
+            "container_type": row.container_type,
+            "container_id": row.container_id,
+        }
+
+    _handlers["page-config-ensure"] = _page_config_ensure
+
     return bp

cart/entrypoint.sh

@@ -10,8 +10,34 @@ if [[ -n "${DATABASE_HOST:-}" && -n "${DATABASE_PORT:-}" ]]; then
   done
 fi
 
-# NOTE: Cart app does NOT run Alembic migrations.
-# Migrations are managed by the blog app which owns the shared database schema.
+# Create own database + run own migrations
+if [[ "${RUN_MIGRATIONS:-}" == "true" && -n "${ALEMBIC_DATABASE_URL:-}" ]]; then
+  python3 -c "
+import os, re
+url = os.environ['ALEMBIC_DATABASE_URL']
+m = re.match(r'postgresql\+\w+://([^:]+):([^@]+)@([^:]+):(\d+)/(.+)', url)
+if not m:
+    print('Could not parse ALEMBIC_DATABASE_URL, skipping DB creation')
+    exit(0)
+user, password, host, port, dbname = m.groups()
+
+import psycopg
+conn = psycopg.connect(
+    f'postgresql://{user}:{password}@{host}:{port}/postgres',
+    autocommit=True,
+)
+cur = conn.execute('SELECT 1 FROM pg_database WHERE datname = %s', (dbname,))
+if not cur.fetchone():
+    conn.execute(f'CREATE DATABASE {dbname}')
+    print(f'Created database {dbname}')
+else:
+    print(f'Database {dbname} already exists')
+conn.close()
+" || echo "DB creation failed (non-fatal), continuing..."
+
+  echo "Running cart Alembic migrations..."
+  (cd cart && alembic upgrade head)
+fi
 
 # Clear Redis page cache on deploy
 if [[ -n "${REDIS_URL:-}" && "${REDIS_URL}" != "no" ]]; then
@@ -25,5 +51,11 @@ print('Redis cache cleared.')
 fi
 
 # Start the app
-echo "Starting Hypercorn (${APP_MODULE:-app:app})..."
-PYTHONUNBUFFERED=1 exec hypercorn "${APP_MODULE:-app:app}" --bind 0.0.0.0:${PORT:-8000} --workers ${WORKERS:-2} --keep-alive 75
+RELOAD_FLAG=""
+if [[ "${RELOAD:-}" == "true" ]]; then
+  RELOAD_FLAG="--reload"
+  echo "Starting Hypercorn (${APP_MODULE:-app:app}) with auto-reload..."
+else
+  echo "Starting Hypercorn (${APP_MODULE:-app:app})..."
+fi
+PYTHONUNBUFFERED=1 exec hypercorn "${APP_MODULE:-app:app}" --bind 0.0.0.0:${PORT:-8000} --workers ${WORKERS:-2} --keep-alive 75 ${RELOAD_FLAG}