[codex] support Folia hotload through Shiroha 26.2

[heoduling]

Summary

• retain the custom Folia-safe Bukkit hotload lifecycle, player-owned scheduling, bounded cleanup, packet limiting, and post-hotload handshake recovery
• accept standard Bukkit plus dotted and dashed Paper/Shiroha 26.2 version strings
• select the existing 1.21.5+ compatibility implementation for 26.1 through 26.2 regardless of local build revision
• cover the reported 26.2.local-SNAPSHOT and 26.2-local-SNAPSHOT formats in the plugin self-test

Root cause

The inherited Bukkit version parser only accepted legacy x.y[.z]-R... strings. Shiroha 26.2 reports a Paper-style local build string, so Simple Voice Chat disabled before compatibility initialization.

Impact

The 2.6.21-hotload Bukkit plugin now initializes compatibility version 20 and starts its UDP service on Shiroha/Folia 26.2 while preserving the existing hotload-specific safety fixes.

Validation

• :bukkit:pluginSelfTest passed
• :bukkit:shadowJar passed
• normal Shiroha 26.2 startup selected compatibility version 20 and started UDP 24454
• forced -Dvoicechat.compatibility=26.2-local-SNAPSHOT startup passed
• occupied UDP 24454 path disabled SVC without UnsupportedOperationException
• package inspection found no duplicate entries, signatures, or test classes and retained folia-supported: true

Remaining live checks

A real voice-chat client was not available for UDP audio and fresh-player post-hotload handshake verification. PlugManX 3.0.4 could not execute the unload/load cycle because PlugManX itself fails to parse the Shiroha local build token.