Add BeanFlows MVP: coffee analytics dashboard, API, and web app

- Fix pipeline granularity: add market_year to cleaned/serving SQL models
- Add DuckDB data access layer with async query functions (analytics.py)
- Build Chart.js dashboard: supply/demand, STU ratio, top producers, YoY table
- Add country comparison page with multi-select picker
- Replace items CRUD with read-only commodity API (list, metrics, countries, CSV)
- Configure BeanFlows plan tiers (Free/Starter/Pro) with feature gating
- Rewrite public pages for coffee market intelligence positioning
- Remove boilerplate items schema, update health check for DuckDB
- Add test suite: 139 tests passing (dashboard, API, billing)

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

web/pyproject.toml

@@ -0,0 +1,48 @@
+[project]
+name = "beanflows"
+version = "0.1.0"
+description = "Commodity analytics for coffee traders"
+readme = "README.md"
+requires-python = ">=3.11"
+authors = [
+    { name = "Hendrik Deeman", email = "hendrik@beanflows.coffee" }
+]
+dependencies = [
+    "quart>=0.19.0",
+    "aiosqlite>=0.19.0",
+    "duckdb>=1.0.0",
+    "httpx>=0.27.0",
+    "python-dotenv>=1.0.0",
+
+    "itsdangerous>=2.1.0",
+    "jinja2>=3.1.0",
+    "hypercorn>=0.17.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/beanflows"]
+
+[tool.uv]
+dev-dependencies = [
+    "hypothesis>=6.100.0",
+    "pytest>=8.0.0",
+    "pytest-asyncio>=0.23.0",
+    "respx>=0.22.0",
+    "ruff>=0.3.0",
+]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "UP"]
+ignore = ["E501"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]