GHSA-X26H-XMV8-GXF7 stigmem-node: RTBF tombstones are mis-attributed and suppress reads tenant-blind (cross-tenant BOLA)

Summary On a multi-tenant stigmem node, RTBF right-to-be-forgotten tombstones were mis-scoped two ways. 1 issuetombstone defaulted the tenant to "default" instead of the caller's tenant, so tombstones could be written to the wrong tenant. 2 The read-suppression path — gettombstonefilter...