🐛 Preserve in-flight debugger probe entries on removal

[watson]

Motivation

Removing a debugger probe used to clear its active entry stack immediately. For reentrant or recursive instrumented functions, this could drop an outer frame's pending snapshot if an inner frame exhausted the lifetime budget or if the probe was removed while the outer frame was still in flight.

Changes

• Move active entry bookkeeping onto each initialized probe instance instead of a global map keyed by probe id.
• Let removed probe instances drain already accepted in-flight entries, while preventing future entries through the probe registry.
• Add identity-checked removeProbe(probe) behavior so stale in-flight probe instances cannot remove a newer replacement with the same probe id.
• Centralize lifetime budget transitions in enforceProbeLifetimeBudget() and recordProbeEventSent().
• Document that clearProbes() remains aggressive teardown for tests and the delivery API circuit breaker.
• Add unit coverage for recursive lifetime-budget draining, replacement isolation, and the removeProbe(probe) overload contract.

Test instructions

Run:

yarn test:unit --spec packages/debugger/src/domain/api.spec.ts --spec packages/debugger/src/domain/probes.spec.ts

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[watson]

• 🐛 Preserve in-flight debugger probe entries on removal #4688 👈 (View in Graphite)
• main

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[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	173.69 KiB	173.69 KiB	0 B	0.00%	✅
Rum Profiler	8.08 KiB	8.08 KiB	0 B	0.00%	✅
Rum Recorder	21.24 KiB	21.24 KiB	0 B	0.00%	✅
Logs	55.47 KiB	55.47 KiB	0 B	0.00%	✅
Rum Slim	131.39 KiB	131.39 KiB	0 B	0.00%	✅
Worker	22.99 KiB	22.99 KiB	0 B	0.00%	✅

🔗 RealWorld

[datadog-prod-us1-5]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 68.57%
• Overall Coverage: 76.72% (-0.04%)

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[watson]

Had to push again to resolve a merge conflict + a logic conflict with some of the changes that had landed in main.