Chat: the IP-resolution diagnostic only with CHAT_LOG_IP_RESOLUTION=1 (it logged every connection's addresses: its 'first few' test never stopped) (#115)

ddiff --git a/server/chat/chat-server.js b/server/chat/chat-server.js
iindex 0a854ac..6dc5fcb 100644
---- a/server/chat/chat-server.js
++++ b/server/chat/chat-server.js
@@@ -260,8 +260,10 @@ class ChatServer {
      handleConnection(ws, req) {
          const ip = this.getClientIp(req);
  
--        // Diagnostic: log IP resolution chain for first few connections
--        if (this.anonMap.size < 20) {
++        // Diagnostic, on demand only (CHAT_LOG_IP_RESOLUTION=1): the header chain behind the resolved address. It used to
++        // log every connection's addresses (its "first few" test was anonMap.size < 20, which stays small), putting
++        // visitors' IPs in the journal for nothing (2026-10-17).
++        if (process.env.CHAT_LOG_IP_RESOLUTION === '1') {
              console.log('[Chat] IP resolution — cf-connecting-ip:', req.headers?.['cf-connecting-ip'] || '(none)',
                  '| x-forwarded-for:', req.headers?.['x-forwarded-for'] || '(none)',
                  '| x-real-ip:', req.headers?.['x-real-ip'] || '(none)',