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

apps/zk-circuits/test2.circom

@@ -0,0 +1,9 @@
+pragma circom 2.0.0;
+
+template Test() {
+    signal input in;
+    signal output out;
+    out <== in;
+}
+
+component main = Test();