Add Auto publishing mode to UDPStreamer; optimise WebUI hub

UDPStreamer:
- Add PublishingMode = "Strict" | "Auto" config parameter
- Add MinRefreshRate (Hz) for Auto mode; uses HRT phase-locked tick
  counting to rate-limit sends without accumulation buffers
- Fix high-frequency integration test configs to use newline-separated
  key-value pairs (MARTe2 StandardParser does not treat ';' as delimiter)
- Add 3 new unit tests (AutoMode_Valid, AutoMode_MissingRefreshRate,
  UnknownPublishingMode); all 33 tests passing

WebUI hub:
- Skip ring-buffer LTTB writes when zoom has not been accessed in 10 s,
  reducing idle CPU usage
- Use unsafe float64→bytes reinterpretation to eliminate per-element
  encoding overhead in the hot broadcast path

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

Test/Components/DataSources/UDPStreamer/UDPStreamerTest.h

@@ -162,6 +162,21 @@ public:
      */
     bool TestQuantization_Uint8Clamping();
 
+    /**
+     * @brief Tests PublishingMode = "Auto" with a valid MinRefreshRate.
+     */
+    bool TestInitialise_AutoMode_Valid();
+
+    /**
+     * @brief Tests that PublishingMode = "Auto" without MinRefreshRate is rejected.
+     */
+    bool TestInitialise_AutoMode_MissingRefreshRate();
+
+    /**
+     * @brief Tests that an unknown PublishingMode string is rejected.
+     */
+    bool TestInitialise_UnknownPublishingMode();
+
     /**
      * @brief Tests the GetPort() accessor.
      */