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/UDPStreamerGTest.cpp

@@ -61,6 +61,21 @@ TEST(UDPStreamerGTest, TestInitialise_ZeroStackSize) {
     ASSERT_TRUE(test.TestInitialise_ZeroStackSize());
 }
 
+TEST(UDPStreamerGTest, TestInitialise_AutoMode_Valid) {
+    UDPStreamerTest test;
+    ASSERT_TRUE(test.TestInitialise_AutoMode_Valid());
+}
+
+TEST(UDPStreamerGTest, TestInitialise_AutoMode_MissingRefreshRate) {
+    UDPStreamerTest test;
+    ASSERT_TRUE(test.TestInitialise_AutoMode_MissingRefreshRate());
+}
+
+TEST(UDPStreamerGTest, TestInitialise_UnknownPublishingMode) {
+    UDPStreamerTest test;
+    ASSERT_TRUE(test.TestInitialise_UnknownPublishingMode());
+}
+
 TEST(UDPStreamerGTest, TestGetBrokerName_Output) {
     UDPStreamerTest test;
     ASSERT_TRUE(test.TestGetBrokerName_Output());