Ultra Fast Pregen

## Ultra Fast Pregen 14 for Fabric 1.21.1 Requires Fabric Loader 0.14+, Minecraft 1.21.1, Java 21+ (Fabric API not needed). Server side only (works in singleplayer). **First release for Fabric 1.21.1**, with everything the other builds have. ### Faster * **Worldgen-heavy worlds:** feature placement skips Minecraft's per-call chunk checks inside a batch, and `matching_blocks` predicates compare blocks directly (Tectonic + WWOO + C2ME: 127.8 → 156.8 chunks/s, measured on NeoForge 26.1.2). * **No more waiting for the previous batch's lighting:** the batch's last tasks go first (with C2ME: 354.2 → 378.1 chunks/s, measured on NeoForge 26.1.2). * **Modpacks keep the fast terrain path:** the check of other mods' mixins now looks at the methods they actually change, so mixins that only add accessors or touch other methods no longer slow it down. ### Safer * **Safety net:** if a batch fails on the fast paths (usually another mod's code that does not expect them), it is generated again the way Minecraft does and the run carries on; the log names the mods involved. Before, the run stopped. * Fixed "reading the area's region headers failed" with **C2ME**'s chunk storage. * Lighting can no longer hang: a batch whose light makes no progress for 3 minutes stops with a message. * **Moonrise** is not supported yet: `/pregen start` now says so and starts nothing, instead of failing with an error. * Light at batch edges no longer depends on timing. ### Speed Against Chunky on NeoForge 26.1.2 (Ryzen 5 7500F, 3,000 × 3,000 blocks): Overworld 3.1×, Tectonic + WWOO 5.3×, Nether 4.2×, End 1.4× faster; 1.1× to 1.6× with C2ME on both sides. Full numbers on the project page. ### Tested on this build * The automated test suite passes: blocks, biomes and light identical to Minecraft's own generation (Overworld, Nether, End and the other world presets), batch edges, stopping and resuming, joining existing areas, and the safety net. * On a dedicated server, in the Overworld, Nether and End with every saved chunk checked, alone and together: C2ME; Lithium; Lithium, ScalableLux, Noisium, FerriteCore, ModernFix; Distant Horizons; Terralith, Biomes O' Plenty, YUNG's Better Caves; all of them together. All passed. * Moonrise: refused with a message, as intended (not supported yet). Full results and the tested mod versions: [https://github.com/Pongsapat3791/Ultra-Fast-Pregen/blob/main/COMPATIBILITY.md](https://github.com/Pongsapat3791/Ultra-Fast-Pregen/blob/main/COMPATIBILITY.md)