chore(security): enhance environment configuration, CI workflows, and wallet daemon with security improvements

- Restructure .env.example with security-focused documentation, service-specific environment file references, and AWS Secrets Manager integration
- Update CLI tests workflow to single Python 3.13 version, add pytest-mock dependency, and consolidate test execution with coverage
- Add comprehensive security validation to package publishing workflow with manual approval gates, secret scanning, and release

contracts/foundry.toml

@@ -0,0 +1,19 @@
+[profile.default]
+src = "contracts"
+out = "out"
+libs = ["lib"]
+test = "test"
+
+[profile.default.optimizer]
+enabled = true
+runs = 200
+
+[profile.default.model_checker]
+contracts = { "contracts/AIPowerRental.sol" = ["AIPowerRental"] }
+engine = "cheth"
+timeout = 10000
+targets = ["assert"]
+
+[profile.fuzz]
+runs = 1000
+max_test_rejects = 65536