feat(back-end): db connections and other stuff

backend/src/main/resources/application.properties

@@ -14,13 +14,6 @@ spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
 slicer.path=${SLICER_PATH:/Applications/OrcaSlicer.app/Contents/MacOS/OrcaSlicer}
 profiles.root=${PROFILES_DIR:profiles}
 
-# Pricing Configuration
-# Mapped to legacy environment variables for Docker compatibility
-pricing.filament-cost-per-kg=${FILAMENT_COST_PER_KG:25.0}
-pricing.machine-cost-per-hour=${MACHINE_COST_PER_HOUR:2.0}
-pricing.energy-cost-per-kwh=${ENERGY_COST_PER_KWH:0.30}
-pricing.printer-power-watts=${PRINTER_POWER_WATTS:150.0}
-pricing.markup-percent=${MARKUP_PERCENT:20.0}
 
 # File Upload Limits
 spring.servlet.multipart.max-file-size=200MB