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/classes/competitor.py

@@ -0,0 +1,28 @@
+from app import db, ma
+from datetime import datetime
+
+class CompanyPrice(db.Model):
+    __tablename__ = "company_prices"
+    __table_args__ = {"schema": "public"}
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    company_name = db.Column(db.String(255), nullable=False, index=True)
+    town = db.Column(db.String(100), nullable=True)
+    price_decimal = db.Column(db.Numeric(6, 3), nullable=False)
+    scrape_date = db.Column(db.Date, nullable=False, index=True)
+    zone = db.Column(db.String(50), nullable=False, default="zone10", index=True)
+    created_at = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
+    
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "company_name": self.company_name,
+            "town": self.town,
+            "price": float(self.price_decimal) if self.price_decimal else None,
+            "date": self.scrape_date.isoformat() if self.scrape_date else None,
+            "zone": self.zone
+        }
+
+class CompanyPriceSchema(ma.SQLAlchemyAutoSchema):
+    class Meta:
+        model = CompanyPrice