feat: 5-tier pricing, market ticker integration, and delivery stats

Major update spanning pricing, market data, and analytics:

- Pricing: Replace single-price service fees with 5-tier pricing for
  same-day, prime, and emergency deliveries across create/edit/finalize
- Market: Add Ticker_Price and CompanyPrice models with endpoints for
  live commodity prices (HO, CL, RB) and competitor price tracking
- Stats: Add daily/weekly/monthly gallons endpoints with multi-year
  comparison and YoY totals for the stats dashboard
- Delivery: Add map and history endpoints, fix finalize null-driver crash
- Schema: Change fill_location from INTEGER to VARCHAR(250), add
  pre_load normalization for customer updates, fix admin auth check

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

app/common/decorators.py

@@ -20,7 +20,7 @@ def login_required(f):
 def admin_required(f):
     @wraps(f)
     def decorated_function(*args, **kwargs):
-        if not current_user.is_authenticated or not current_user.admin_role:
+        if not current_user.is_authenticated or (not current_user.admin_role and not current_user.admin):
             return error_response("Admin access required", 403)
         return f(*args, **kwargs)
     return decorated_function