Sable Schematics 0.2.36. Single-mod replacement for 0.2.35 on clients and server.

Fixes invisible ship construction introduced by 0.2.35 without restoring BlockDisplay placeholder entities.
Landed visual-only Schematicannon shots are retained only on the client long enough to be copied into a lightweight rough-preview cache of block state + target position. The server continues removing visual-only shots and never places ship staging blocks.

The client rough renderer is enabled again, but it renders the cached block plans directly instead of spawning entities. The cache survives Create's normal FlyingBlocks synchronization so completed portions of the ship remain visible while later shots are fired. It clears when the cannon stops/finishes. The renderSingleBlock reflection lookup is resolved once per render call instead of once per cached block.

BlockDisplay entity count remains zero in the active montage runtime. Block-entity models are still skipped in the rough preview and appear when final Sable assembly completes. Final synchronous ship assembly/physics cost is unchanged.

Validation: regression test reproduces 0.2.35 preview loss after flight-list sync, patched cache retains the landed visual and clears on finish. Client landing test verifies client tick-1 retention, server removal, and active flight countdown. JAR integrity, Java 21 class level, mixin presence, version, and unrelated-entry preservation are checked during packaging.
