serverless/client: CALLING-TIPS.md for downstream agents

serverless: qwen-edit-nsfw + faceswap-lissie endpoints (configs, clients, docs); handler fixes (passthrough LoadImage rewrite, seed range/map, output cleanup); .git stripped from node layers

serverless: client scripts (sync/async) + README; timings from live endpoint tests

serverless: RunPod worker (handler, build/deploy scripts, Dockerfile, qwen-edit-turbo endpoint)