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Improve Ollama error handling and connection checking - Add Ollama server connection check before API calls - Improve error messages for better debugging - Add detailed error logging for Ollama communication errors

Fix Ollama communication error and update Railway PostgreSQL setup guide

Add detailed Railway PostgreSQL setup guide

Add PostgreSQL setup guide for data persistence

Improve SystemConfig logging and add verification after saving settings

Add database connection status check API endpoint and documentation

Add database connection status logging and PostgreSQL connection verification

Fix: Update Permissions-Policy header to use only supported features

Debug: Temporarily disable 404 handler and add route registration logging

Fix: Add cache control headers for browser compatibility to prevent 404 errors

Fix: Use Flask-Login unauthorized_handler instead of 404 handler for login redirect

Fix: Redirect to login page in 404 handler for unauthenticated users

Restart: Trigger Hugging Face Spaces rebuild

Fix: Add Permissions-Policy header and replace autofocus with JavaScript to fix iframe warnings

Fix: Add favicon handler and improve 404 error handling

Add PostgreSQL support and update database configuration for data persistence in Hugging Face Spaces

Fix: Change POST endpoint from /parent-chunk to /process/parent-chunk and improve error handling

Fix: Change POST endpoint from /parent-chunk to /process/parent-chunk to fix Method Not Allowed error

Fix: Change POST endpoint from /parent-chunk to /process/parent-chunk to fix Method Not Allowed error

Fix: Add file path validation and better error handling for file reading in Parent Chunk creation

Fix: Improve error handling for Parent Chunk creation with better error messages and file path validation

Fix: Remove Ollama installation and start.sh from Dockerfile for Hugging Face Spaces

Fix: Add Hugging Face Spaces configuration to README.md

Security: Remove all hardcoded Hugging Face tokens from history

Update: Hugging Face 배포 설정 및 EXAONE 통합 개선

병합: feature/development의 토큰 제거 버전을 master에 병합

보안: Hugging Face 토큰을 환경 변수로 변경