docs: Enhance MONOREPO_CONVERSION_PLAN.md with improved details

- Specify production-ready implementation details for sal-git
  package.
- Add a detailed code review and quality assurance process
  section.
- Include comprehensive success metrics and validation checklists
  for production readiness.
- Improve security considerations and risk mitigation strategies.
- Add stricter code review criteria based on sal-git's conversion.
- Update README with security configurations and environment
  variables.

git/tests/git_executor_tests.rs

@@ -137,3 +137,42 @@ fn test_git_executor_error_from_io_error() {
         _ => panic!("Expected CommandExecutionError variant"),
     }
 }
+
+#[test]
+fn test_redis_url_configuration() {
+    // Test default Redis URL
+    std::env::remove_var("REDIS_URL");
+    std::env::remove_var("SAL_REDIS_URL");
+
+    // This is testing the internal function, but we can't access it directly
+    // Instead, we test that GitExecutor can be created without panicking
+    let executor = GitExecutor::new();
+    let _executor = executor; // Just verify it was created successfully
+}
+
+#[test]
+fn test_redis_url_from_environment() {
+    // Test REDIS_URL environment variable
+    std::env::set_var("REDIS_URL", "redis://test:6379/1");
+
+    // Create executor - should use the environment variable
+    let executor = GitExecutor::new();
+    let _executor = executor; // Just verify it was created successfully
+
+    // Clean up
+    std::env::remove_var("REDIS_URL");
+}
+
+#[test]
+fn test_sal_redis_url_from_environment() {
+    // Test SAL_REDIS_URL environment variable (fallback)
+    std::env::remove_var("REDIS_URL");
+    std::env::set_var("SAL_REDIS_URL", "redis://sal-test:6379/2");
+
+    // Create executor - should use the SAL_REDIS_URL
+    let executor = GitExecutor::new();
+    let _executor = executor; // Just verify it was created successfully
+
+    // Clean up
+    std::env::remove_var("SAL_REDIS_URL");
+}