Refactor: Use ImageMagick/libheif for conversion and Tesseract.js for OCR

Fix: PaddleOCR syntax error and robust Tesseract data path mapping

Fix: Robust Tesseract paths and PaddleOCR param fallback

Fix: Resolve Tesseract missing language data and PaddleOCR constructor errors

Feat: Support .heic image format for OCR

Refactor: Replace Optiic API with local PaddleOCR service

System Stability Patch: Fix trust proxy, chainable NeDB models, absolute upload paths, and sentinel stack safety

Critical Fix: Resolve 401 'Subject not found' loop, stabilize HF Space persistence, and improve session recovery

Stability Fix: Prevent HF Space restart loop by disabling internal git pushes, and improve image recognition data flow

Strategic Migration: Complete NeDB Architecture with Cloud Persistence and Image Recognition Fixes (Clean)

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