OreSpawn 4.0.8 for Forge 1.12.2

[SkyBlade1978]

Summary

• fixes Ore and Fluid editor fields so long saved host, tag, dimension and biome values survive opening and saving the editor without truncation;
• retains the Forge 1.12.2-specific 4.0.7 packaged access-transformer repair;
• updates this branch to OreSpawn 4.0.8.112021 and the shared four-component version policy;
• ports the ForgeGradle 7/Gradle 9 reproducible build, release-artifact audits, pinned GitHub Actions workflows and release safeguards;
• restores the current README badges and updates the Forge 1.12.2 build documentation;
• fixes generated Eclipse launches by resolving MC_VERSION to 1.12.2 and synchronizing processed metadata/guides into bin/main.

No public API, profile schema, provider format, migration semantics or world-generation behaviour changes.

Validation

• 146 tests across 36 suites, with no failures or skips;
• exact Forge 14 and Cleanroom packaged-jar fresh/reload server qualification;
• launcher-like packaged client world create, enter, save and reload;
• editor round-trip coverage for all eight long persisted fields;
• release artifact, Java 8 bytecode, reobfuscation, access-transformer, locale, documentation and fixture-exclusion audits;
• real Eclipse runClient reached the Minecraft 1.12.2 menu with processed guide resources present;
• hosted build/audit, CodeQL and Gradle-wrapper workflows passed on the accepted tree;
• final manual player testing passed.

The release dispatcher is not changed or invoked by this PR.