docs: describe the TCP transport, multiplexing and TCPStreamJoin in README, architecture and StreamHub docs

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

README.md

@@ -12,6 +12,7 @@ This repository integrates two complementary capabilities:
 | Capability            | Component                | Purpose                                                                                                       |
 | --------------------- | ------------------------ | ------------------------------------------------------------------------------------------------------------- |
 | **Signal streaming**  | `UDPStreamer` DataSource | Continuously stream selected signals to a browser-based oscilloscope over UDP                                 |
+| **Signal streaming (TCP)** | `TCPStreamer` / `TCPStreamerClient` DataSources, `TCPStreamService`, `TCPStreamJoin` | Same UDPS stream over reliable TCP; one in-process server for many streams; multiplexed connections and merged streams |
 | **Signal debugging**  | `DebugService` Interface | On-demand signal tracing, value forcing, and conditional breakpoints — zero application code changes required |
 | **Sine generation**   | `SineArrayGAM`           | Generate continuous sine-wave arrays for testing and simulation                                               |
 | **Time stamping**     | `TimeArrayGAM`           | Provide time-reference arrays aligned to an RT cycle                                                          |
@@ -30,8 +31,11 @@ MARTe_Integrated_components/
 │   └── Client/go/                  Go packages: udpsprotocol, wshub
 ├── Source/Components/
 │   ├── DataSources/UDPStreamer/     Real-time UDP signal streaming DataSource
+│   ├── DataSources/TCPStreamer/     TCP variant of UDPStreamer (plus TCPStreamerClient)
 │   ├── GAMs/SineArrayGAM/          Sine-wave array generator GAM
 │   ├── GAMs/TimeArrayGAM/          Time-reference array GAM
+│   ├── Interfaces/UDPStream/       UDPS server/client transports (UDP and TCP)
+│   ├── Interfaces/TCPStreamService/ In-process multi-stream TCP server + TCPStreamJoin
 │   ├── Interfaces/DebugService/    Signal tracing/forcing/breakpoint Interface
 │   └── Interfaces/TCPLogger/       TCP log-forwarding LoggerConsumerI
 ├── Test/
@@ -59,6 +63,21 @@ sending a `CONNECT` packet; the server then sends `CONFIG` (signal metadata) and
 
 See `Docs/UDPStreamer.md` and `Docs/Protocol.md`.
 
+### TCPStreamer / TCPStreamService / TCPStreamJoin
+
+`TCPStreamer` and `TCPStreamerClient` are the TCP counterparts of the UDP DataSources: same
+UDPS framing, per-client bounded queues (a slow client only drops its own frames).
+`TCPStreamService` is an optional single in-process server (acceptor + worker threads)
+shared by many `TCPStreamer`s; clients pick a stream by name with a `SUBSCRIBE` frame.
+
+- **Multiplexing**: a `SUBSCRIBE` may list several streams (`"fast,slow"`) to carry them over
+  one socket, each with its own CONFIG and rate. StreamHub does this for a comma separated
+  `StreamName`.
+- **Joining**: `TCPStreamJoin` publishes a new stream merging several streams of the service
+  (`<stream>_<signal>`, sample-and-hold, paced by a master source).
+
+See `Docs/TCPStreamer.md`.
+
 ### SineArrayGAM
 
 Generates a continuous float32 sine-wave array every RT cycle. Used as a signal
@@ -119,7 +138,7 @@ clients on a configurable port. Works as a sidecar to `DebugService`.
 ### StreamHub Application
 
 Headless C++ hub (`Source/Applications/StreamHub/`) that aggregates multiple
-UDPStreamer sources and serves them to oscilloscope clients over WebSocket
+UDPStreamer / TCPStreamer sources (`Transport = "tcp"`, optional `StreamName`) and serves them to oscilloscope clients over WebSocket
 (port 8090): ring buffers with wall-clock time calibration, LTTB decimation,
 hub-side trigger engine, per-window zoom. Clients: browser SPA
 (`Client/webui` + `Client/udpstreamer/static`) and native ImGui desktop client
@@ -132,7 +151,7 @@ See `Docs/StreamHub-UserGuide.md`, `Docs/StreamHub-API.md` and
 ### UDPS Protocol
 
 The `Common/UDP/UDPSProtocol.h` header defines the shared binary wire format used by
-both `UDPStreamer` and `DebugService`. It is intentionally free of MARTe2-specific
+`UDPStreamer`, `TCPStreamer` and `DebugService`. It is intentionally free of MARTe2-specific
 dependencies so it can also be used by Go clients (via `Common/Client/go/udpsprotocol`).
 
 See `Docs/Protocol.md`.
@@ -244,6 +263,7 @@ Open `http://localhost:9090`, explore the object tree, trace signals, force valu
 | ----------------------------- | -------------------------------------------------------------- |
 | `Docs/Protocol.md`            | UDPS binary wire protocol specification                        |
 | `Docs/UDPStreamer.md`         | UDPStreamer DataSource configuration reference                 |
+| `Docs/TCPStreamer.md`         | TCPStreamer, TCPStreamService, multiplexing and TCPStreamJoin   |
 | `Docs/UDPS-C-Client.md`       | Standalone C/C++ UDPS receiver library (`Common/Client/c`)     |
 | `Docs/SineArrayGAM.md`        | SineArrayGAM configuration reference                           |
 | `Docs/DebugService.md`        | DebugService TCP API and architecture                          |