fix: remove tao-shen/HuggingClaw-data refs to prevent unwanted linked spaces

feat: auto-derive dataset repo name from HF_TOKEN when AUTO_CREATE_DATASET=true

security: change AUTO_CREATE_DATASET default to false

docs: add detailed env var table with examples, change sync interval to 60s

chore: replace gpt-4o-mini with gpt-5-nano everywhere

chore: default repo → HuggingClaw-data, default model → DeepSeek V3 (free)

Remove Telegram env vars, clean up README and .env.example

feat: add AUTO_CREATE_DATASET env var to control dataset auto-creation

feat: professional README, .env.example, architecture diagram

deploy: HuggingClaw with original Dockerfile