Upload plugin/scripts/prompt_submit.py with huggingface_hub

Fix auto_session_start: proper parsing of sessions list and upsert logic

Fix double stdin read bug in prompt_submit.py hook

Add logging to prompt_submit hook

Allow dynamic AGENTMEMORY_URL and AGENTMEMORY_SECRET in stdio MCP wrapper

feat: add Python plugin system, multi-agent connect CLI, and MCP tool expansions

Clean up legacy TS/Node files, fix Dolt backup path sync bug, and update CSP connect-src header

Initialize Hugging Face Space deployment for AgentMemory Python (clean without assets)