Everboyzo

Introduce SECURITY.md to document the project's security policy and provide guidelines for reporting vulnerabilities

Add `restart: unless-stopped` to the fastapi, otel-collector, swarm-cpu, swarm-gpu and ollama services in docker-compose.yaml to ensure containers restart automatically after failures or host reboots

docs: add .env.example with placeholders

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the file documents necessary environment variables for running and testing FHEVM

chore: bump OpenZeppelin deps to v5.5.0

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updating these packages pulls in bug fixes and new features, and note that imports may need minor adjustments