Increase DeadlineTest timing margins for Windows compatibility

Windows has coarse timer resolution (~15.6ms), so the previous tight
margins (20ms action, 30ms deadline = 10ms margin) were insufficient.

Increased margins to:
- DEADLINE_MS: 30 -> 100
- ACTION_LONG_MS: 50 -> 150
- ACTION_SHORT_MS: 20 -> 30

This gives a 70ms margin, well within Windows timer capabilities.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: facontidavide

tests/gtest_decorator.cpp

@@ -20,12 +20,12 @@
 using BT::NodeStatus;
 using std::chrono::milliseconds;
 
-// Timing constants for faster test execution
-constexpr int DEADLINE_MS = 30;  // Timeout threshold
+// Timing constants - need generous margins for Windows timer resolution (~15.6ms)
+constexpr int DEADLINE_MS = 100;  // Timeout threshold
 constexpr auto ACTION_LONG_MS =
-    milliseconds(50);  // Action longer than deadline (will timeout)
+    milliseconds(150);  // Action longer than deadline (will timeout)
 constexpr auto ACTION_SHORT_MS =
-    milliseconds(20);  // Action shorter than deadline (will succeed)
+    milliseconds(30);  // Action shorter than deadline (will succeed)
 
 struct DeadlineTest : testing::Test
 {