feat: initialize market app with browsing, product, and scraping code

Split from coop monolith. Includes:
- Market/browse/product blueprints
- Product sync API
- Suma scraping pipeline
- Templates for market, browse, and product views
- Dockerfile and CI workflow for independent deployment

README.md

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+# Market App
+
+Product browsing and marketplace application for the Rose Ash cooperative.
+
+## Overview
+
+The Market app is one of three microservices split from the original coop monolith:
+
+- **coop** (:8000) - Blog, calendar, auth, settings
+- **market** (:8001) - Product browsing, categories, product detail
+- **cart** (:8002) - Shopping cart, orders, payments
+
+## Architecture
+
+- **Framework:** Quart (async Flask)
+- **Database:** PostgreSQL 16 with SQLAlchemy 2.0 (async)
+- **Cache:** Redis (tag-based page cache)
+- **Frontend:** HTMX + Jinja2 + Tailwind CSS
+- **Data:** Products scraped from Suma Wholesale
+
+## Blueprints
+
+- `bp/market/` - Market root (navigation, category listing)
+- `bp/browse/` - Product browsing with filters and infinite scroll
+- `bp/product/` - Product detail pages
+- `bp/api/` - Product sync API (used by scraper)
+
+## Development
+
+    # Install dependencies
+    pip install -r requirements.txt
+
+    # Set environment variables
+    export $(grep -v '^#' .env | xargs)
+
+    # Run migrations
+    alembic upgrade head
+
+    # Scrape products
+    bash scrape.sh
+
+    # Run the dev server
+    hypercorn app:app --reload --bind 0.0.0.0:8001
+
+## Scraping
+
+    # Full scrape (max 50 pages, 200k products, 8 concurrent)
+    bash scrape.sh
+
+    # Test scraping
+    bash scrape-test.sh
+
+## Docker
+
+    docker build -t market .
+    docker run -p 8001:8000 --env-file .env market
+
+## Environment Variables
+
+    DATABASE_URL_ASYNC=postgresql+asyncpg://user:pass@localhost/coop
+    REDIS_URL=redis://localhost:6379/0
+    SECRET_KEY=your-secret-key
+    SUMA_USER=your-suma-username
+    SUMA_PASSWORD=your-suma-password
+    APP_URL_COOP=http://localhost:8000
+    APP_URL_MARKET=http://localhost:8001
+    APP_URL_CART=http://localhost:8002