feat: implement OSSFS storage backend in sandbox lifecycle#340

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hittyt wants to merge 10 commits intoalibaba:mainfrom

hittyt:feat/support-ossfs-api

Commits on Mar 4, 2026

feat: implement OSSFS storage backend in sandbox lifecycle
hittyt
committed

Commits on Mar 8, 2026

refactor(server): isolate ossfs mount logic and align validation behavior
hittyt
committed
fix(server): rollback prepared ossfs mounts on partial failure
hittyt
committed

Commits on Mar 9, 2026