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/scripts/backup.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+# BeanFlows Manual Backup Script
+
+BACKUP_DIR="./backups"
+TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+DB_PATH="./data/app.db"
+
+mkdir -p "$BACKUP_DIR"
+
+# Create backup using SQLite's backup command
+sqlite3 "$DB_PATH" ".backup '$BACKUP_DIR/app_$TIMESTAMP.db'"
+
+# Compress
+gzip "$BACKUP_DIR/app_$TIMESTAMP.db"
+
+echo "✅ Backup created: $BACKUP_DIR/app_$TIMESTAMP.db.gz"
+
+# Clean old backups (keep last 7 days)
+find "$BACKUP_DIR" -name "*.db.gz" -mtime +7 -delete
+
+echo "🧹 Old backups cleaned"