[SkyBlade1978]

This brings 1.10.2 onto the newer build and release setup, together with the save and add-on compatibility work tested locally.

• Use ForgeGradle 7 and Gradle 9.6.1 while keeping Java 8 for Minecraft.
• Require the published OreSpawn 4.1.2 release and replace the old plugin and fallback generator with the native provider. Keep custom settings, disabled rules and existing terrain.
• Keep Cyano door items, coal powder and Mercury when upgrading old worlds, including chunks opened later. Preserve the old MMD API and support the unchanged Base Metal Golems add-on.
• Use master-1.10.2, pinned build/CodeQL/wrapper checks and the shared release dispatcher. Build one checked bundle for Maven, CurseForge and GitHub.
• Keep test mods, optional integration APIs and Windows folder metadata out of ordinary Eclipse launches and public jars. Use UTF-8/LF text on every platform and remove the old Travis setup.

Local checks passed: 16 unit tests, cold and offline Forge setup, packaged OS1/OS3 imports, custom overrides, vanilla takeover on/off, separate Cyano and MMD save upgrades, Eclipse isolation and release-artifact checks. Two clean builds produced identical release jars. The save tests include first load, reload and chunks opened later. The earlier Golems and Advantage-mod checks used disposable copies; original worlds were left alone.

[CLAassistant]

All committers have signed the CLA.