Fix Cork Coaster synchronization and support

[Alatyami]

Summary

• synchronize Cork Coaster block-entity inventory changes after a player retrieves a bottle
• clear stale client inventory contents before applying an empty update tag
• break Cork Coasters when their supporting surface becomes invalid
• preserve normal coaster and stored-bottle drops when support is removed

Root causes

The bottle renderer reads the coaster block entity, but the state-change path did not always send the updated block-entity contents. The client also retained its old one-slot contents when an empty update tag was loaded.

The coaster already implemented canSurvive, but did not reevaluate that rule during neighbor shape updates, allowing unsupported coasters to float.

Validation

• ./gradlew.bat compileJava -x createMinecraftArtifacts
• ./gradlew.bat test -x createMinecraftArtifacts
• git diff --check
• manually confirmed retrieving a bottle removes its rendered model immediately without relogging
• manually confirmed removing support breaks the coaster and drops the coaster and stored bottle exactly once

Closes #199
Closes #198