AtlasSpigot 1.21.7 - v1 (new Leaf version track)

A fifth Leaf version track: Minecraft 1.21.7 - same rebrand, same bStats service wiring, same tuning philosophy.

Same missing-feature profile as 1.21.8, confirmed by checking the generated config rather than assumed: this branch's Leaf source has no RegionFormatConfig (no B_LINEAR - world storage stays on vanilla MCA), and its ReduceUselessPackets module only has reduce-entity-move-packets. Documented in 1.21.7/NOTES.md.

A genuinely new finding this time: dab.enabled defaults to true out of the box in this version's Leaf source (verified directly in DynamicActivationofBrain.java), unlike the newer tracks where it defaults false and needs explicit enabling. No config change was needed for it here - already on by default.

entity-tracking-range is halved from this version's own stock defaults (same 128/96/96/96/128/64 baseline as the other recent tracks).

Verified: booted fresh with no config to capture real defaults, then booted again with the full tuned config applied - clean both times, correct AtlasSpigot branding, no errors.

Build note: this branch pins Gradle 8.14.2, which only supports up to Java 24 - built with Java 21 instead of the environment's default Java 25 (a build-tool requirement only; doesn't affect what Java the resulting server jar runs on).

Config, notes, source-patches, and jar live under 1.21.7/.