chore: bump ppy.osu.Framework to 2026.526.1

Includes:
- perf: eliminate hot-path allocations in ThreadRunner, Scheduler, ButtonEventManager
- fix: pauseAllThreads infinite loop (skip WaitForState on non-Running threads)
- fix: TestDisposalDuringAsyncLoad (don't clear loadables after onLoaded callback)
- fix: InspectCode inconsistent-synchronization (threadsSnapshot volatile)
- fix: Vulkan timeout thread leak (Interlocked flag for abandoned CreateVulkan)
- fix: renderer fallback error logging and ALL-renderers-fail exception
- perf: Metal fence SpinWait instead of Thread.Sleep(10)
- veldrid: per-driver Vulkan quirks system + Vortice.Vulkan 3.2.3

Agent-Logs-Url: https://github.com/winnerspiros/osu/sessions/6921b7da-b0a5-4607-b174-bfd5bdc3402b

Co-authored-by: winnerspiros <1675249+winnerspiros@users.noreply.github.com>

Author: Copilot

osu.Android.props

@@ -52,7 +52,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2026.521.1" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2026.526.1" />
     <!-- `ppy.osu.Framework.NativeLibs` is a transitive dependency of `ppy.osu.Framework`
          that ships desktop-only natives (Linux/macOS/Windows) under `runtimes/<rid>/native/`
          — including a bare Linux `libbass.so`/`libbass_fx.so`/`libbassmix.so` for linux-arm64.

osu.Game/osu.Game.csproj

@@ -38,10 +38,10 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Realm" Version="20.1.0" />
-    <PackageReference Include="ppy.osu.Framework" Version="2026.521.1" />
+    <PackageReference Include="ppy.osu.Framework" Version="2026.526.1" />
     <!--
       Explicitly pin `ppy.Veldrid.SPIRV` to the winnerspiros fork build that
-      `ppy.osu.Framework 2026.521.1` was compiled against. This version is the only
+      `ppy.osu.Framework 2026.526.1` was compiled against. This version is the only
       one whose `runtimes/android-arm64/native/libveldrid-spirv.so` is aligned to 16 KB
       pages (required by Android 16+). It lives only as a release asset on
       <https://github.com/winnerspiros/veldrid-spirv/releases/tag/1.0> and is vendored

osu.iOS.props

@@ -33,6 +33,6 @@
     <SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2026.521.1" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2026.526.1" />
   </ItemGroup>
 </Project>