docs: remove CHANGELOG.md

CHANGELOG.md

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-# Changelog
-
-All notable changes to this project will be documented in this file.
-
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
-and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
-
-## [3.0.0] - 2024-12-15
-
-### Highlights
-
-**DeepAudit v3.0.0** introduces a revolutionary **Multi-Agent Intelligent Audit System**:
-
-- Multi-Agent Architecture with Orchestrator-driven decision making
-- RAG (Retrieval-Augmented Generation) knowledge base enhancement
-- Docker sandbox for automated vulnerability verification
-- Professional security tool integration
-
-### Added
-
-#### Multi-Agent Architecture
-- **Orchestrator Agent**: Centralized orchestration for autonomous audit strategy decisions
-- **Recon Agent**: Information gathering, technology stack identification, and entry point discovery
-- **Analysis Agent**: Deep vulnerability analysis with Semgrep, RAG semantic search, and LLM analysis
-- **Verification Agent**: Sandbox testing, PoC generation, false positive filtering
-
-#### RAG Knowledge Base
-- Code semantic understanding with Tree-sitter AST-based chunking
-- CWE/CVE vulnerability knowledge base integration
-- ChromaDB vector database support
-- Multi-language support: Python, JavaScript, TypeScript, Java, Go, PHP, Rust
-
-#### Security Sandbox
-- Docker isolated container for PoC execution
-- Resource limits: memory, CPU constraints
-- Network isolation with configurable access
-- seccomp security policies
-
-#### Security Tools Integration
-- **Semgrep**: Multi-language static analysis
-- **Bandit**: Python security scanning
-- **Gitleaks**: Secret leak detection
-- **TruffleHog**: Deep secret scanning
-- **npm audit**: Node.js dependency vulnerabilities
-- **Safety**: Python dependency audit
-- **OSV-Scanner**: Multi-language dependency vulnerabilities
-
-#### New Features
-- Kunlun-M (MIT License) security scanner integration
-- File upload size limit increased to 500MB with large file optimization
-- Improved task tabs with card-style layout
-- Enhanced error handling and project scope filtering
-- Streaming LLM token usage reporting with input estimation
-
-### Changed
-- Refactored Agent architecture with dynamic Agent tree
-- Expanded high-risk file patterns and dangerous pattern library
-- Enhanced sandbox functionality with forced sandbox verification
-- Improved report generation with normalized severity comparisons
-- Better agent stream stability preventing unnecessary reconnections
-
-### Fixed
-- Agent stream stability issues with correct event buffer draining
-- Sandbox tool initialization logging improvements
-- Task phase update to REPORTING on completion
-- Various UI/UX improvements in AgentAudit component
-
----
-
-## [2.0.0] - 2024-11-15
-
-### Added
-- Multi-LLM platform support (OpenAI, Claude, Gemini, Qwen, DeepSeek, Zhipu, etc.)
-- Ollama local model support for privacy-focused deployments
-- Project management with GitHub/GitLab import
-- ZIP file upload support
-- Instant code analysis feature
-- What-Why-How three-step fix recommendations
-- PDF/JSON report export
-- Audit rules management (OWASP Top 10 built-in)
-- Prompt template management with visual editor
-- Runtime LLM configuration in browser
-- i18n support (Chinese/English)
-
-### Changed
-- Migrated to FastAPI backend
-- React 18 frontend with TypeScript
-- PostgreSQL database with Alembic migrations
-- Docker Compose deployment support
-
----
-
-## [1.0.0] - 2024-10-01
-
-### Added
-- Initial release
-- Basic code security audit functionality
-- LLM-powered vulnerability detection
-- Simple web interface