Maps to GET /positions. Reads all LP positions a wallet holds on a given chain by calling the SwapWizard API, which discovers positions across all supported protocols: Uniswap V2/V3/V4, Aerodrome, Thena, SushiSwap, PancakeSwap, Algebra, Balancer, Curve, and all Solidly forks. Each position includes positionId, nftManager, dexName, liquidityKind, token addresses, amounts, fees, in-range status, APR, and USD values. EXIT SIGNAL: each position also carries `momentumSignal` for its pool — "exit" means the pool's volume is dying or LPs are leaving (consider zapping out), "watch"/"entry" mean momentum is still alive. When `momentumSignal` is ABSENT, the pool has dropped out of the momentum ranking (momentum exhausted) — also a reason to review and likely exit the position. `momentumScore` is the composite strength. Use this to drive exit decisions, mirroring the entry signal from search_liquidity_pools. The API uses Alchemy's NFT APIs for optimal position discovery — pass an Alchemy RPC URL via rpcUrl for fastest results. Without an Alchemy key, the API falls back to on-chain scanning which may be slower and newly created positions may take longer to appear. IMPORTANT: Always call this BEFORE zap_out_of_lp_position — pass the returned positionId, nftManager, dexName, and liquidityKind directly to zap_out_of_lp_position.