Add Optimism Sepolia → Mainnet Config

[dDevAhmed]

📚 Overview

Prepare deployment configurations for both testnet and mainnet environments.

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🎯 Objectives

• Network configs
• Environment variables
• Gas settings
• RPC configuration

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🧠 Scope

Hardhat config updates:

• networks:
• optimismSepolia
• optimismMainnet

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✅ Acceptance Criteria

• Deployments succeed on Sepolia
• Mainnet config prepared
• Env variables documented

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⏳ Complexity

Medium

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[HushLuxe]

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