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]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• Tighten Live Debugger global hook typing #4508 👈 (View in Graphite)
• Add Live Debugger package #4449 : 5 other dependent PRs (#4480 , #4503 , #4509 and 2 others)
• Fix TanStack Router lint resolution in test app #4513
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[datadog-prod-us1-4]

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage (details)
• Patch Coverage: 0.00%
• Overall Coverage: 76.68% (-0.02%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: c5ebc6b | Docs | Datadog PR Page | Give us feedback!}

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	179.42 KiB	179.42 KiB	0 B	0.00%	✅
Rum Profiler	6.16 KiB	6.16 KiB	0 B	0.00%	✅
Rum Recorder	27.03 KiB	27.03 KiB	0 B	0.00%	✅
Logs	56.80 KiB	56.80 KiB	0 B	0.00%	✅
Rum Slim	135.26 KiB	135.26 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	0.00545	0.0044	-19.27%
RUM - add action	0.0161	0.013	-19.25%
RUM - add error	0.013999999999999999	0.0125	-10.71%
RUM - add timing	0.00295	0.0027	-8.47%
RUM - start view	0.01405	0.0121	-13.88%
RUM - start/stop session replay recording	0.0009	0.0007	-22.22%
Logs - log message	0.016900000000000002	0.0148	-12.43%

🧠 Memory Performance

Action Name	Base Memory Consumption	Local Memory Consumption	𝚫
RUM - add global context	31.53 KiB	32.09 KiB	+575 B
RUM - add action	101.84 KiB	115.15 KiB	+13.31 KiB
RUM - add timing	32.46 KiB	32.35 KiB	-116 B
RUM - add error	104.34 KiB	93.58 KiB	-10.76 KiB
RUM - start/stop session replay recording	32.01 KiB	31.58 KiB	-439 B
RUM - start view	489.22 KiB	490.67 KiB	+1.45 KiB
Logs - log message	99.21 KiB	109.68 KiB	+10.47 KiB

🔗 RealWorld