Revert lazy profile-tree changes to mitigate CpuProfile::Delete crash

[szegedi]

Summary

Reverts the two commits that switched profile collection to lazy/callback-based paths, restoring the eager translation flow for both time and heap profilers. See PROF-14622 for the crash analysis that motivates this — two customer reports (dd-trace 5.98.0 / Node 20.20.2 and dd-trace 5.101.0 / Node 22.20.0, both on @datadog/pprof 5.14.1) abort inside glibc's free() heap-consistency check while V8 is destroying CpuProfile state at the end of WallProfiler::StopAndCollectImpl. The lazy view widens the window in which a new V8 profile is sampling while the old one is being deleted (the JS callback runs in between), and aborts are observed across two V8 majors.

• Revert "use stop and collect on time profiler (#305)" — restores Stop / StopImpl and the eager TranslateTimeProfile path; stopAndCollect / profileV2 remain available but no longer the only entry.
• Revert "Switch heap profiling to use lazy allocation profile method by default (#281)" — restores getAllocationProfile as the default for heap.
• Add explicit return types to eager time-profiler stop() / profile() — small TS 6 compat fix: the TS 6 bump (build(deps-dev): bump typescript from 5.9.3 to 6.0.3 #315) postdates the reverted commits, so the restored functions now trip TS2883 under composite: true. One Profile import and two return annotations, no runtime change.

The lazy code (BuildTimeProfileView, mapAllocationProfile, stopV2 / profileV2) stays in place so downstream consumers that want it can still opt in — only the defaults are reverted.

Test plan

• npm run build — native build clean
• npm run compile — TS clean under TS 6
• npm test — 96 passing, 0 failing (mocha suites including memory comparison v1 vs v2 still pass)
• dd-trace integration: bump pprof to the prerelease cut from this branch and confirm the customer crashes do not reproduce
• Decide whether the lazy code (stopAndCollect / mapAllocationProfile) should be kept for opt-in use or also removed in a follow-up once PROF-14622 root cause is understood

Jira: PROF-14622

[github-actions]

Overall package size

Self size: 2.09 MB
Deduped: 2.45 MB
No deduping: 2.45 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | source-map | 0.7.6 | 185.63 kB | 185.63 kB | | pprof-format | 2.2.1 | 163.06 kB | 163.06 kB | | node-gyp-build | 4.8.4 | 13.86 kB | 13.86 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}