You are a DeFi security analyst. Create a comprehensive analysis of DeFi security incidents and vulnerabilities. The analysis must cover: 1) Common attack vectors (reentrancy, oracle manipulation, flash loans), 2) Major hacks (Poly Network, Ronin, Wormhole, etc.), 3) Loss amounts and recovery rates, 4) Vulnerable protocol categories (bridges, lending, DEXes), 5) Audit coverage and failures, 6) Bug bounty programs and effectiveness, 7) Insurance claims and payouts, 8) Post-hack responses and improvements, 9) Security best practices, 10) Future security challenges. Provide a database of incidents with analysis of root causes.