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/schemas/customer.py

@@ -1,4 +1,4 @@
-from marshmallow import Schema, fields, validate, EXCLUDE
+from marshmallow import Schema, fields, validate, EXCLUDE, pre_load
 
 
 class CreateCustomerSchema(Schema):
@@ -67,6 +67,18 @@ class UpdateCustomerSchema(Schema):
     class Meta:
         unknown = EXCLUDE
 
+    @pre_load
+    def normalize_data(self, data, **kwargs):
+        # Convert empty strings to None for email
+        if 'customer_email' in data and data['customer_email'] == "":
+            data['customer_email'] = None
+            
+        # Convert boolean to int for customer_automatic
+        if 'customer_automatic' in data:
+            if isinstance(data['customer_automatic'], bool):
+                data['customer_automatic'] = 1 if data['customer_automatic'] else 0
+        return data
+
     customer_last_name = fields.Str(
         validate=validate.Length(min=1, max=250)
     )
@@ -106,9 +118,9 @@ class UpdateCustomerSchema(Schema):
         allow_none=True,
         validate=validate.Length(max=2000)
     )
-    customer_fill_location = fields.Int(
+    customer_fill_location = fields.Str(
         allow_none=True,
-        validate=validate.Range(min=0, max=10)
+        validate=validate.Length(max=250)
     )