Endless v0.8

Create expanded-height compatibility:

• Use logical build limits for mechanical-arm client points and rope pulleys.
• Discover elevator contacts in allocated sparse pages, including persisted/evicted pages.
• Preserve exact contraption local positions in disk and spawn NBT; retain native legacy readers.
• Require new real Create machine/network and client-selection gates at dense, page and packed-Y boundaries.
• Bump the supported Create loader handshake protocols to reject older clients without the exact contraption reader.
• Preserve train graph packet heights beyond the signed-short range, including pixel offsets and dimension/framing data.
• Keep chorus-potato teleport destinations in the logical build envelope; preserve native landing/collision behavior with bounded allocated-page floor discovery.
• Persist exact assembly-error highlight positions while retaining legacy NBT readers.
• Keep mining cracks and Create multi-position cracks separate at packed-Y aliases; clean them up on update, retarget, removal and world replacement.
• Require restored moving entities, mounted inventories, drill actors and controller linkage across a fresh server JVM.
• Require native client selection packets, normal-tick arm inventory transfers and ejector delivery in survival mode at packed aliases.
• Invalidate Minecraft 1.21.1 navigation classification caches on sparse writes, including mutations before the dense chunk starts ticking.

What's Changed

• compat: support Create at sparse high Y (v0.7) by @UpperMoon0 in #17
• Fix Create expanded-height compatibility and require native gameplay coverage by @UpperMoon0 in #18

Full Changelog: v0.6...v0.8