Fix Noise handshake failures and implement binary protocol migration

## Summary
- Added timestamps to SecureLogger for precise timing analysis
- Implemented NoiseHandshakeCoordinator to prevent race conditions
- Added deterministic role selection based on peer ID comparison
- Implemented proper handshake state machine with retry logic
- Added duplicate message detection for handshake messages
- Improved logging and diagnostics for handshake debugging

## Details
The coordinator ensures only one peer initiates handshakes by using deterministic role selection (lower peer ID initiates). This prevents the simultaneous handshake attempts that were causing failures. The state machine tracks handshake progress and handles retries with exponential backoff.

## Testing
Successfully builds with no errors or warnings. The implementation should resolve the "establishing encryption" stuck state issue by ensuring proper handshake coordination between peers.

bitchat/Utils/SecureLogger.swift

@@ -22,6 +22,16 @@ class SecureLogger {
     static let keychain = OSLog(subsystem: subsystem, category: "keychain")
     static let session = OSLog(subsystem: subsystem, category: "session")
     static let security = OSLog(subsystem: subsystem, category: "security")
+    static let handshake = OSLog(subsystem: subsystem, category: "handshake")
+    
+    // MARK: - Timestamp Formatter
+    
+    private static let timestampFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateFormat = "HH:mm:ss.SSS"
+        formatter.timeZone = TimeZone.current
+        return formatter
+    }()
     
     // MARK: - Cached Regex Patterns
     
@@ -135,7 +145,8 @@ class SecureLogger {
     /// Format location information for logging
     private static func formatLocation(file: String, line: Int, function: String) -> String {
         let fileName = (file as NSString).lastPathComponent
-        return "[\(fileName):\(line) \(function)]"
+        let timestamp = timestampFormatter.string(from: Date())
+        return "[\(timestamp)] [\(fileName):\(line) \(function)]"
     }
     
     /// Sanitize strings to remove potentially sensitive data