Move file cache to standalone module, add timer fix, fix refcount crashes

File cache (filecache module):
- Moved from transform44 sub-module to standalone src/filecache/
- 2-way set-associative cache (32768 sets x 2 ways) with FNV-1a hash + finalizer
- Fixed negative cache hit crash: zero output params before returning 0
  (FindFileInArchive reuses filename slot for out_outer_archive)
- Fixed path 2 crash: set out_outer_archive on all cache hit paths
- Fixed stale block_entry crash: cache block index instead of raw pointer,
  recompute from archive+0x290 on each hit
- Fixed archive-freed crash: use game's FindAndIncrementResourceReference
  (0x650780) instead of manual +0x38 increment -- validates archive is alive
- Periodic stats dump with projected time savings (hit=~1000cy vs miss=~30000cy)

Timer fix (transform44 sub-module, ported from VanillaFixes):
- TSC calibration via QPC reference over 500ms
- Enables TSC mode if game was using GetTickCount fallback
- NtSetTimerResolution for 0.5ms OS timer granularity
- SetProcessInformation to disable Windows 11 power throttling
- Always-on (no A/B toggle -- no measurable impact on Wine/Linux)

build.zig

@@ -30,6 +30,7 @@ const module_list = [_]ModuleDesc{
     .{ .name = "dpslog", .desc = "Enable structured combat log events for addons", .default = false },
     .{ .name = "transform44", .desc = "Enable transformMatrix4x4 hook", .default = false },
     .{ .name = "addonperf", .desc = "Enable addon memory/CPU profiling API" },
+    .{ .name = "filecache", .desc = "Enable MPQ archive file cache", .default = false },
 };
 
 pub fn build(b: *std.Build) void {
@@ -68,6 +69,14 @@ pub fn build(b: *std.Build) void {
             .optimize = .ReleaseFast,
         }),
     });
+    const math_sse_obj = b.addObject(.{
+        .name = "math_sse",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("src/transform44/math_sse.zig"),
+            .target = target,
+            .optimize = .ReleaseFast,
+        }),
+    });
 
     const lib = b.addLibrary(.{
         .name = "weirdutils",
@@ -84,6 +93,7 @@ pub fn build(b: *std.Build) void {
     });
     lib.root_module.addObject(clip_sse_obj);
     lib.root_module.addObject(bone_sse_obj);
+    lib.root_module.addObject(math_sse_obj);
     b.installArtifact(lib);
 
     // Convenience step to build all single-module variants