Full sync: ERP DocIQ + reasoning models + fine-tuning + extreme OCR docs + classify/prompt fixes

sync backend/finetune/erp_sft.jsonl

sync backend/finetune/erp_finetune_report.json

sync backend/app/config.py

sync backend/app/models_registry.py

Add ERP DocIQ module (NLQ/analytics/summary/reasons)

Add complex invoice (MiniCPM vision OCR) + complex multi-step web automation tab

Deploy ERP-DocIQ: agentic OCR + IDP (MiniCPM-V 8B, Tesseract)