Add native fuel provider integrations

[roncodes]

Summary

• adds FleetOps fuel provider connection and transaction models, resources, filters, routes, and sync service
• implements PetroApp as the first native fuel provider adapter
• adds fuel provider management, transaction review, fuel report metadata, and dashboard summary UI

Validation

• PHP syntax checks for new fuel-provider backend files
• focused FleetOps ESLint and Ember template lint
• FleetOps npm run build passed