refactor(contracts): remove deprecated AIPowerRental contract in favor of bounty system

- Delete AIPowerRental.sol (566 lines) - replaced by AgentBounty.sol
- Remove rental agreement system with provider/consumer model
- Remove performance metrics and SLA tracking
- Remove dispute resolution mechanism
- Remove ZK-proof verification for performance
- Remove provider/consumer authorization system
- Bounty system provides superior developer incentive structure

contracts/scripts/check-balance.js

@@ -0,0 +1,44 @@
+const { ethers } = require("hardhat");
+
+async function main() {
+    try {
+        const [deployer] = await ethers.getSigners();
+        const balance = await deployer.getBalance();
+        const balanceEth = ethers.utils.formatEther(balance);
+        
+        console.log("💰 Deployer Account Balance");
+        console.log("==========================");
+        console.log(`Address: ${deployer.address}`);
+        console.log(`Balance: ${balanceEth} ETH`);
+        
+        // Calculate USD value (assuming $2000/ETH)
+        const balanceUsd = parseFloat(balanceEth) * 2000;
+        console.log(`USD Value: $${balanceUsd.toFixed(2)}`);
+        
+        // Balance recommendations
+        const minRecommended = 10; // Minimum ETH recommended for deployment
+        const safeAmount = 20; // Safe amount for deployment + buffer
+        
+        if (parseFloat(balanceEth) >= safeAmount) {
+            console.log("✅ Sufficient balance for deployment");
+        } else if (parseFloat(balanceEth) >= minRecommended) {
+            console.log("⚠️  Minimum balance met, but consider adding more ETH for safety");
+        } else {
+            console.log("❌ Insufficient balance. Minimum 10 ETH recommended for deployment");
+        }
+        
+        // Output just the balance for script consumption
+        console.log(balanceEth);
+        
+    } catch (error) {
+        console.error("Error checking balance:", error);
+        process.exit(1);
+    }
+}
+
+main()
+    .then(() => process.exit(0))
+    .catch((error) => {
+        console.error(error);
+        process.exit(1);
+    });