Add profiler integration for wall-clock signal suppression and TaskBlock events

[kaahos]

What Does This Do

• Adds ProfilingContextIntegration hooks (ticks, TaskBlock, park enter/exit) and wires DatadogProfilingIntegration -> JavaProfiler.
• ProfilingDdprofWallClockBridge: if getProfilingContext() is null on park exit, still call native parkExit (registered from DatadogProfilingIntegration).
• LockSupport: instrument park* / unpark parkEnter always (span optional); actual TaskBlock recording happens inside java-profiler.
• Object.wait(long) (JDK 21+): may emit TaskBlock after >= 1 ms; unblockingSpanId stays 0.
• New modules lock-support-profiling, object-wait-profiling + tests.

Motivation

java-profiler changes suppress redundant wall-clock signals while blocked (sleep / park) and record datadog.TaskBlock for analysis. The agent must call those JNI hooks with ticks and span context so suppression and TaskBlock events work end-to-end without dropping correctness.

Additional Notes

• linked PR: java-profiler must ship the matching ddprof artifact (JNI + native).
• encode / encodeOperationName / encodeResourceName behavior remains 0 for ddprof (same as prior ProfilingContextIntegration defaults); comment clarifies intent.
• Object.wait: only wait(long) is instrumented.

Contributor Checklist

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• Update public documentation with any new configuration flags or behaviors

Jira ticket: [PROJ-IDENT]

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