weirdperformance: f64-intermediate bone transform to eliminate spell/doodad z-fighting

Adds bone_sse64.zig as an f64-intermediate port of transformMatrix4x4, used as
the active hook. M2 bone matrices are built and multiplied as [16]f64 and only
narrow to f32 on final store into the bone output buffer -- matching the x87
original's rounding profile (wide intermediates, single f32 store) and keeping
M2 vertex positions aligned with the terrain/projected-texture pipeline.

Also fixes, in both bone_sse (f32) and bone_sse64:

- Pre-billboard tx/ty/tz accumulation order (row 0 = pz+px+py; rows 1/2 = pz+py+px)
- Post-billboard pos_y/pos_z accumulation order (py+pz+px)
- Post-billboard scale-recompute accumulation order (row0 + row2 + row1)
- Billboard types 2/4 normalize using f64 intermediates (load-bearing for camera
  basis vectors -- pure f32 drifted from x87 by a ULP per axis and caused
  particle emitters to jitter on camera motion)

Additional bone_sse64-specific changes:

- Local attachmentRecursion64 that recurses into transformImpl_SSE64 instead of
  bone_sse.transformImpl_SSE, so attached child models stay on the f64 path
- child_padding (this+0x84) computed with f64 intermediates

bone_sse remains the reference f32 implementation; its struct fields, inline
helpers, and section-loop fns are now `pub` so bone_sse64 can share them
(types/interpolation helpers/post-loop loops). Artifact size is unchanged.

build.zig adds bench_bone_sse64 object; src/bench/main.zig runs the new variant
through the same warmup/timing harness and prints SSE vs SSE64 vs BASELINE
cycles plus a parity check.

build.zig

@@ -19,23 +19,23 @@ const ModuleDesc = struct {
 /// affect the module's DLL, minor for feature changes, major for breaking.
 const module_list = [_]ModuleDesc{
     .{ .name = "pngscreenshots", .version = "1.0.1", .desc = "Enable screenshot module", .src_dir = "screenshot" },
-    .{ .name = "interact", .version = "1.0", .desc = "Enable interact module", .addon_name = "Interact" },
+    .{ .name = "interact", .version = "1.1.0", .desc = "Enable interact module", .addon_name = "Interact" },
     .{ .name = "outline", .version = "1.0", .desc = "Enable outline module", .default = false, .addon_name = "Outline" },
-    .{ .name = "worldmarkers", .version = "1.0", .desc = "Enable world markers module", .addon_name = "WorldMarkers", .addon_hidden = true },
+    .{ .name = "worldmarkers", .version = "1.1", .desc = "Enable world markers module", .addon_name = "WorldMarkers", .addon_hidden = true },
     .{ .name = "framecrash", .version = "1.0", .desc = "Enable framecrash fix", .default = false },
-    .{ .name = "logsessions", .version = "1.0.1", .desc = "Enable log session rotation", .addon_name = "LogSessions" },
+    .{ .name = "logsessions", .version = "1.1.0", .desc = "Enable log session rotation", .addon_name = "LogSessions", .addon_hidden = true },
     .{ .name = "minimapicons", .version = "1.0.1", .desc = "Enable custom minimap icons", .addon_name = "MinimapIcons" },
     .{ .name = "transmogfix", .version = "1.0.1", .desc = "Enable transmog update coalescing" },
     .{ .name = "customassets", .version = "1.0.1", .desc = "Enable loose file loading & permissive patch glob" },
     .{ .name = "healtextfix", .version = "1.0.1", .desc = "Enable SuperWoW heal text fix" },
     .{ .name = "bigcursor", .version = "1.0.1", .desc = "Enable big cursor module" },
-    .{ .name = "clickthrough", .version = "1.0.2", .desc = "Enable GO click-through" },
+    .{ .name = "clickthrough", .version = "1.0.3", .desc = "Enable GO click-through" },
     .{ .name = "dpslog", .version = "0.1", .desc = "Enable structured combat log events for addons", .default = false },
     .{ .name = "transform44", .version = "1.0", .desc = "Enable transform44 profiling/A/B testing (dev only)", .default = false },
     .{ .name = "addonperf", .version = "1.0", .desc = "Enable addon memory/CPU profiling API", .default = false },
     .{ .name = "ssemaths", .version = "1.0", .desc = "Enable UnitXP x87 math polyfill replacements (SSE)", .default = false },
     .{ .name = "silicon", .version = "1.0", .desc = "Enable SSE2 math replacements (ported from libSiliconPatch)", .default = false },
-    .{ .name = "weirdperformance", .version = "1.1.1", .desc = "Enable production performance optimizations (SSE, inflate, filecache, timer, luastr, luavm)", .default = true },
+    .{ .name = "weirdperformance", .version = "1.2.1", .desc = "Enable production performance optimizations (SSE, inflate, filecache, timer, luastr, luavm)", .default = true },
     .{ .name = "superweirdo", .version = "0.1", .desc = "Enable GO loot sparkle on interactable objects", .default = false },
     .{ .name = "luagc", .version = "0.1", .desc = "Enable incremental Lua GC (replaces stop-the-world mark+sweep)", .default = false },
 };
@@ -235,6 +235,18 @@ pub fn build(b: *std.Build) void {
                 .optimize = .ReleaseFast,
             }),
         });
+        const bench_bone_sse64 = b.addObject(.{
+            .name = "bench_bone_sse64",
+            .root_module = b.createModule(.{
+                .root_source_file = b.path("src/weirdperformance/bone_sse64.zig"),
+                .target = b.resolveTargetQuery(.{
+                    .cpu_arch = .x86,
+                    .os_tag = .linux,
+                    .cpu_features_add = std.Target.x86.featureSet(&.{ .sse, .sse2, .sse3, .sse4_1, .fma, .avx }),
+                }),
+                .optimize = .ReleaseFast,
+            }),
+        });
         const bench_bone_baseline = b.addObject(.{
             .name = "bench_bone_baseline",
             .root_module = b.createModule(.{
@@ -270,6 +282,7 @@ pub fn build(b: *std.Build) void {
         bench.root_module.addObject(bench_math_sse);
         bench.root_module.addObject(bench_silicon_sse);
         bench.root_module.addObject(bench_bone_sse);
+        bench.root_module.addObject(bench_bone_sse64);
         bench.root_module.addObject(bench_bone_baseline);
         bench.root_module.addObject(bench_particle_sse);
         bench.root_module.addObject(bench_cull_sse);