Update src/agent/research_agent.py

fix: memory manager

fix: Add comprehensive response cleaning validation

fix: Clean LLM responses and fix variable scope errors

feat: Replace CoinGecko with CryptoCompare/Etherscan APIs

fix: Add missing validate_gemini_response method and cleanup method

new

feat: Add Gemini/Ollama toggle functionality with API error fixes

fix: Resolve config attribute error and chart_data_tool parameter handling

project complete

final commit with chart generation

feat: testing done

feat: added api tools