Fix occlusion cache errors and player visibility desyncs

[Minecraft0122]

Summary

• reset stale hidden-player state on respawn and dimension changes
• keep dead players visible and refresh Fabric wrappers against the replacement player entity
• invalidate the cached chunk when the culling data provider switches worlds
• publish occlusion cache data and vertical bounds as one consistent snapshot
• handle empty chunks without negative array sizes and recompute safely when blocks change outside a minified cache
• add regression coverage for empty chunks, downward cache growth, and same-coordinate world switches

Issues

• Fixes Bug: false player culling on nether roof after dimension change when using world threader mod #13
• Fixes There's a new error on the Folia console. #14
• Fixes End errors #15
• Fixes Player hidden when it shouldn't #16
• Related to A New ERROR #7: both linked mclo.gs logs now return 404. The crash-prevention guard described by that report is already present on master via 100f1ce; this PR additionally hardens the cache concurrency and retry paths. Without the original traces, A New ERROR #7 remains for maintainer follow-up.

Verification

• gradlew :platform-common:test :core:test :platform-paper:compileJava --configure-on-demand --offline
• Full repository GitHub Actions build, including all Paper, Folia, and Fabric targets
• Build artifacts uploaded successfully

CI: https://github.com/Minecraft0122/PlayerCulling/actions/runs/29930646207