🚨 Critical Issue #76: SocketBox Method Call Deadlock Investigation

## 🎯 Problem Identification Complete
- SocketBox method calls (bind, isServer, toString) cause infinite blocking
- Root cause: Method resolution pipeline deadlock before execute_socket_method
- Other Box types (ArrayBox, StringBox, MapBox) work normally
- Arc<Mutex> reference sharing confirmed working (Arc addresses match = true)

## 🔧 Debug Infrastructure Added
- Comprehensive debug logging in socket_box.rs (bind, isServer, clone, toString)
- Method call tracing in http_methods.rs
- Deadlock detection points identified at interpreter expressions.rs:462-464

## 📋 Issue #76 Created for Copilot Investigation
- Systematic root cause analysis requirements (Architecture→Parser→Runtime levels)
- Comprehensive test cases: minimal/comprehensive/comparison scenarios
- Strict prohibition of band-aid fixes - architectural analysis required
- Hypothesis: Multiple Arc<Mutex> combinations causing circular deadlock

## 🧪 Test Suite Added
- test_socket_deadlock_minimal.nyash: Minimal reproduction case
- test_socket_methods_comprehensive.nyash: All methods deadlock verification
- test_other_boxes_working.nyash: Normal Box operation confirmation
- SOCKETBOX_ISSUE_REPRODUCTION.md: Complete reproduction guide

## 📊 Impact Assessment
- Phase 9 HTTP server implementation completely blocked
- SocketBox functionality entirely non-functional
- Critical blocker for production readiness
- Requires immediate systematic investigation

🔥 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/interpreter/methods/http_methods.rs

@@ -17,15 +17,25 @@ impl NyashInterpreter {
     ) -> Result<Box<dyn NyashBox>, RuntimeError> {
         match method {
             "bind" => {
+                eprintln!("🔥 SOCKET_METHOD: bind() called");
                 if arguments.len() != 2 {
                     return Err(RuntimeError::InvalidOperation {
                         message: format!("bind() expects 2 arguments, got {}", arguments.len()),
                     });
                 }
                 
+                eprintln!("🔥 SOCKET_METHOD: Evaluating address argument...");
                 let address = self.execute_expression(&arguments[0])?;
+                eprintln!("🔥 SOCKET_METHOD: Address evaluated: {}", address.to_string_box().value);
+                
+                eprintln!("🔥 SOCKET_METHOD: Evaluating port argument...");
                 let port = self.execute_expression(&arguments[1])?;
-                Ok(socket_box.bind(address, port))
+                eprintln!("🔥 SOCKET_METHOD: Port evaluated: {}", port.to_string_box().value);
+                
+                eprintln!("🔥 SOCKET_METHOD: Calling socket_box.bind()...");
+                let result = socket_box.bind(address, port);
+                eprintln!("🔥 SOCKET_METHOD: bind() completed");
+                Ok(result)
             }
             "listen" => {
                 if arguments.len() != 1 {