Complete jewellery management extending standard Odoo workflows:

• Metal & purity master (Gold, Silver, Platinum, configurable)
• Daily metal rate engine with branch/company isolation
• Weight-based pricing: gross → net → chargeable → price
• Old gold / exchange workflow with stock & accounting integration
• Jewellery repair management with 9-stage status flow
• POS barcode scanning with jewellery pricing popup
• Multi-branch inventory & inter-branch transfers
• India GST / BIS hallmark compliance
• Role-based access: Administrator → Branch Manager → Sales → Cashier