feat: add fuel management system backend

- FuelPurchase entity: record fuel purchases with cost tracking
- FuelConsumption entity: monthly aggregation of fuel metrics
- FuelService: record purchases, calculate stats, efficiency
- FuelController: REST API for fuel operations
- FuelModule: integrated into app
- Migration: create fuel_purchases and fuel_consumption tables

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

apps/edr-freight-api/src/modules/fuel/fuel.controller.ts

@@ -0,0 +1,48 @@
+import { Controller, Post, Get, Body, Param, Query } from '@nestjs/common';
+import { ApiTags, ApiOperation } from '@nestjs/swagger';
+import { FuelService } from './fuel.service';
+import { CreateFuelPurchaseDto } from './dto/create-fuel-purchase.dto';
+
+@ApiTags('Fuel Management')
+@Controller('fuel')
+export class FuelController {
+  constructor(private readonly fuelService: FuelService) {}
+
+  @Post('purchases')
+  @ApiOperation({ summary: 'Record fuel purchase' })
+  async recordFuelPurchase(@Body() dto: CreateFuelPurchaseDto) {
+    return this.fuelService.recordFuelPurchase(dto);
+  }
+
+  @Get('purchases/:vehicleId')
+  @ApiOperation({ summary: 'Get fuel purchases for vehicle' })
+  async getFuelPurchases(
+    @Param('vehicleId') vehicleId: string,
+    @Query('startDate') startDate: string,
+    @Query('endDate') endDate: string,
+  ) {
+    return this.fuelService.getFuelPurchases(
+      vehicleId,
+      new Date(startDate),
+      new Date(endDate),
+    );
+  }
+
+  @Get('consumption/:vehicleId/:month')
+  @ApiOperation({ summary: 'Get monthly fuel consumption' })
+  async getMonthlyConsumption(
+    @Param('vehicleId') vehicleId: string,
+    @Param('month') month: string,
+  ) {
+    return this.fuelService.getMonthlyConsumption(vehicleId, new Date(month));
+  }
+
+  @Get('stats/:vehicleId')
+  @ApiOperation({ summary: 'Get fuel statistics for vehicle' })
+  async getVehicleFuelStats(
+    @Param('vehicleId') vehicleId: string,
+    @Query('months') months: number = 12,
+  ) {
+    return this.fuelService.getVehicleFuelStats(vehicleId, months);
+  }
+}