Security & HF Spaces fixes: Enable CSRF, auth middleware, persistent storage

Add comprehensive perturbation testing system with E2E tests

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fix: force sample data insertion on database initialization

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🔧 Fix character ranges for all window KG files

🎬 Complete replay support for all algorithm samples (14 & 16)

🎬 Add replay support for algorithm_sample_0 & algorithm_sample_3

🎯 Redesign window KGs as independent processing stages

🔧 Fix window KG entity reference - remove invalid rel_009 from window_0

🔧 Fix sample data loader to support window KG files for Replay button

🎬 Add temporal replay support for algorithm_sample_1 with 3 progressive window KGs

🧹 Clean up demo data and rebuild frontend

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🧹 Clean up temporary analytics enhancement script

🚀 Add Comprehensive Trace Analytics to Sample Data

🔧 Fix Failure and Optimization Type Field Names

🔧 Fix Critical Computer Terminal Entity Type Error

🔧 Fix All Knowledge Graph Relationship Rule Violations

🔧 Fix Knowledge Graph Relationship Field Names

🎯 Add 3 Diverse Multi-Agent System Examples from Algorithm Dataset

🍽️ Add Complex Location-Based Restaurant Discovery Sample

🔒 Add real AI knowledge graph integration (API keys redacted)

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🗑️ Remove Simple Q&A Demonstration - Keep Only Comprehensive Example

Extend Sample Traces for Realistic AI Assistant Interactions - Multi-step RAG workflow with 4 observations, extended educational conversations, enhanced knowledge graph interactions, and production-quality AI assistant demonstrations

🔧 Remove Remaining Oxford Economics References

🔄 Replace Oxford Economics with Python Documentation Use Case

🔧 Optimize Tool Definition: RAG Search vs Language Model

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🚀 Major Sample Data Enhancement: Complex Multi-Agent Scenarios

🔧 Fix sample data function name in init_db.py

🚀 Enhanced Sample Data: Complete AgentGraph Feature Showcase

🎨 Complete Sample Data Structure Overhaul

🔧 Fix Sample Knowledge Graphs Display Issue

🔧 Fix Sample Data Insertion Import Error

🎯 Add Automatic Sample Data System for New Users

🧹 Clean up and optimize HF Spaces deployment

🔧 Fix SQLAlchemy Connection Pool Error in HF Spaces

🧹 Code Cleanup and Optimization

🎉 Complete Fix for HF Spaces Sample Data Loading

Add comprehensive debug logging to sample data loading

Fix database schema mismatch causing 500 errors - correct INSERT field mappings

Simplify sample data loading with direct SQL to fix HF Spaces connection issues

🔧 Fix SQLAlchemy Session Issues for Sample Data Loading

🔧 Fix Sample Data Loading for HF Spaces

Add Perfect Sample Data for HF Spaces Demo

Add Perfect Demo Environment for HF Spaces - Complete multi-agent trace with rich analysis and auto-loading system