Trust: spine-sync xmlrpc helpers + restamp gen-0 fingerprint (#10533)

[PurHur]

Summary

• Pillar 1 was red: after Stdlib: xmlrpc encode_request/decode_request/type helpers (#22254) #22807, release-readiness regenerates docs/bootstrap-inventory.md (6513) then check-selfhost-spine-coverage-sync fails on five new ext/xmlrpc/xmlrpc_{decode_request,encode_request,get_type,is_fault,set_type}.php units.
• Append those require_once lines to compiler_lib_spine_smoke/main.php and commit the regenerated inventory doc.
• Restamp prelinked/bootstrap-gen0 lowering_source_fingerprint to live 697f2df0… after concurrent master drift (Self-host M5: bootstrap-inventory argv driver size floor — grow beyond 451KB stub #8713 / same pattern as Trust: restamp gen-0 lowering fingerprint after concurrent merge drift (#10533) #22384).

Refs #10533 · #8713 · #21905 · follow-up to #22807

Test plan

• php script/bootstrap-inventory.php --check → OK 6513/6513
• php script/check-selfhost-spine-coverage-sync.php → OK
• php script/check-bootstrap-gen0-manifest-sync.php → OK (697f2df0…)
• make north-star5-verify-fast → OK (fast)
• ./script/release-readiness.sh --json → user_release_ready: yes

user_release_ready: yes
bootstrap-inventory: OK 6513/6513
spine-coverage: OK (spine covers all 6513 inventory files)
north-star5-fast: ok
vm-driver-probe: ok

Made with Cursor

[PurHur]

Post-merge note (lane A)

#10533 comments are locked (2500+), so status lands here:

Before: user_release_ready: no — spine missing 5 xmlrpc units from #22807; gen-0 fingerprint drift.

After this PR: user_release_ready: yes (inventory 6513/6513, spine OK, north-star5-fast OK, vm-driver-probe OK).

Lane A had no eligible language/implementation-ready claim (extension-owned stdlib regressions + meta only); Pillar 1 trust took priority.