feat(tcp): TCPStreamer DataSources, in-process TCPStreamService, stream multiplexing and TCPStreamJoin

Add TCPStreamer/TCPStreamerClient (TCP transport behind the UDPSServerI/UDPSClientI
seam), an optional single in-process TCPStreamService serving many streams over
worker threads, multiplexed SUBSCRIBE (comma list, stream index in fragmentIdx),
and TCPStreamJoin, which merges several streams into one sample-and-hold stream
paced by a master. StreamHub takes a comma list of streams over one connection.
Includes GTests, E2E scenarios s58-s73 and docs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Source/Components/Interfaces/UDPStream/UDPSClient.h

@@ -27,6 +27,7 @@
 #include "StreamString.h"
 #include "StructuredDataI.h"
 #include "UDPSProtocol.h"
+#include "UDPSTransportI.h"
 
 namespace MARTe {
 
@@ -72,7 +73,7 @@ public:
 /**
  * @brief UDPS receiver client with auto-reconnect and fragment reassembly.
  */
-class UDPSClient : public EmbeddedServiceMethodBinderI {
+class UDPSClient : public UDPSClientI, public EmbeddedServiceMethodBinderI {
 public:
 
     /** Maximum number of concurrent in-flight reassembly slots. */