[refactoring][logging]: Normalize log output: always append a newline to echoed quote, switch to Serial1.print.

- EchoReceivedHandler: Always append a newline to the echoed quote before printing, ensuring each log entry has its own line, and making the log easily parseable. Moved peekConsume after print for clarity.
- PrintHandler: Use Serial1.print instead of println, as log entries now include their own trailing newline.

Signed-off-by: Goran Mišković <[email protected]>

Author: schkovich

src/EchoReceivedHandler.cpp

@@ -33,10 +33,10 @@ namespace e5 {
         if (available == 0) return;
         const char *data = m_io.peekBuffer();
         // Print any incoming echo data
-        std::string chunk(data, available);
-        m_io.peekConsume(available);
-        auto quote = std::make_unique<std::string>(chunk);
+        auto quote = std::make_unique<std::string>(data);
+        quote->push_back('\n');
         m_serial_printer.print(std::move(quote));
+        m_io.peekConsume(available);
     }
 
 } // namespace e5

src/PrintHandler.cpp

@@ -31,7 +31,7 @@ namespace e5 {
      */
     void  PrintHandler::onWork() {
         if (!m_message->empty()) {
-            Serial1.println(m_message->c_str());
+            Serial1.print(m_message->c_str());
         }
     }