Unbiased Java CPU profiling with JFR in JDK 25

While traditional Java Flight Recorder (JFR) sampling can be biased and fail to accurately identify CPU-bound hotspots, developers have historically relied on unstable, unsupported JVM internals to achieve higher precision. However, JDK 25 introduces the new `CPUTimeSample` event, providing a stable and officially supported mechanism for accurate CPU-time sampling without risking JVM stability.