Tighten Live Debugger global hook typing

[watson]

Motivation

Avoid unsafe any casts in the Live Debugger global hook setup.

Changes

Replace any casts used when assigning $dd_entry, $dd_return, $dd_throw, and $dd_probes on globalThis with a small explicit DebuggerInstrumentationGlobal type in packages/debugger/src/entries/main.ts.

Test instructions

1. Inspect packages/debugger/src/entries/main.ts.
2. Confirm the debugger globals are still assigned during init().
3. Confirm the change is type-only and does not alter the runtime hook wiring.

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]

• Tighten Live Debugger global hook typing #4508 👈 (View in Graphite)
• Add Live Debugger package #4449 : 4 other dependent PRs (#4480 , #4503 , #4509 and 1 other)
• Fix TanStack Router lint resolution in test app #4513
• main

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[datadog-prod-us1-4]

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage (details)
• Patch Coverage: 0.00%
• Overall Coverage: 76.69% (-0.02%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 6fc9b0b | Docs | Datadog PR Page | Give us feedback!}

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	179.56 KiB	179.56 KiB	0 B	0.00%	✅
Rum Profiler	6.04 KiB	6.04 KiB	0 B	0.00%	✅
Rum Recorder	27.03 KiB	27.03 KiB	0 B	0.00%	✅
Logs	56.69 KiB	56.69 KiB	0 B	0.00%	✅
Rum Slim	135.41 KiB	135.41 KiB	0 B	0.00%	✅
Worker	23.63 KiB	23.63 KiB	0 B	0.00%	✅

🚀 CPU Performance

Action Name	Base CPU Time (ms)	Local CPU Time (ms)	𝚫%
RUM - add global context	0.005	0.0038	-24.00%
RUM - add action	0.014133333333333333	0.0125	-11.56%
RUM - add error	0.013566666666666666	0.0119	-12.29%
RUM - add timing	0.0028333333333333335	0.0025	-11.76%
RUM - start view	0.0131	0.0117	-10.69%
RUM - start/stop session replay recording	0.0007333333333333333	0.0006	-18.18%
Logs - log message	0.014933333333333333	0.0137	-8.26%

🧠 Memory Performance

Action Name	Base Memory Consumption	Local Memory Consumption	𝚫
RUM - add global context	31.23 KiB	31.35 KiB	+126 B
RUM - add action	54.86 KiB	55.03 KiB	+173 B
RUM - add timing	32.96 KiB	32.33 KiB	-644 B
RUM - add error	60.66 KiB	60.62 KiB	-37 B
RUM - start/stop session replay recording	32.15 KiB	31.86 KiB	-299 B
RUM - start view	483.79 KiB	485.50 KiB	+1.71 KiB
Logs - log message	48.88 KiB	49.41 KiB	+543 B

🔗 RealWorld