Preserve legacy Mineralogy upgrades on Forge 1.19.4

[SkyBlade1978]

Summary

• preserves generated worlds created with Mineralogy 1.10.2 3.3.8.26, 1.12.2 3.8.0.53, and the last published legacy engine, Mineralogy 1.18.2 5.4.0
• writes atomic, idempotent OreSpawn and per-world Mineralogy upgrade reports while leaving source configs and existing chunks unchanged
• preserves OreSpawn 4.0.4 world-profile precedence, Custom values, and provider definitions
• adds strict runtime-log scanning and a real flowing-water fresh/reload generation gate

Validation

• 113 tests across 28 suites; zero failures or skips
• fresh/reload surface gate: 2,304 columns per dimension and 38 stable flowing-water blocks
• 37 structured resources parsed; 16 locales with 357 keys
• Java 17 offline lifecycle: clean build, Javadocs, Eclipse runs, and Eclipse metadata
• all three release jars audited with no fixture, oracle, test-world, or test-resource leakage

OreSpawn remains 4.0.6; API major 1 and schemas 4/6/5 are unchanged. The remaining gate is a quick player/UI test before merge.