Trust: refresh 30 stale helper-runtime prelink units after tip drift (#29003)

[PurHur]

Summary

• Pillar 1: user_release_ready: no solely from check-helper-runtime-prelink.php --strict (339 fresh / 30 stale).
• Re-emitted the 30 stale units via php script/emit-helper-runtime-object.php --unit=<path> (honest emit receipt), then published into prelinked/helper-runtime/x86_64-linux/.
• Fingerprints updated (deps include VmString.php drift); unit.o/unit.bc bit-identical to prior commit for these units (IR unchanged).

Test plan

• php script/check-helper-runtime-prelink.php --strict → 369 fresh, 0 stale, 0 broken
• ./script/release-readiness.sh --json → helper-runtime-prelink ok / user_release_ready: yes (running)

Closes #29003

Made with Cursor

[PurHur]

Rebased onto 2c33273ce6 (#29004). Verification on branch:

php script/check-helper-runtime-prelink.php --strict
→ check-helper-runtime-prelink: x86_64-linux — 369 fresh, 0 stale, 0 broken

php script/bootstrap-inventory.php --check
→ OK 7248/7248

Also regenerated docs/bootstrap-inventory.md (construct-flag drift from tip; gate was red without it). Merging next.