pypi: defer Windows wheel — quant.h clock_gettime conflicts with mingw

The Windows mingw64 build hits a quant.h source-level conflict:
  redefinition of 'clock_gettime'
  conflicting type qualifiers for 'atomic_int' (stdatomic.h)

These are real C source issues with mingw, separate from the Python
packaging story. Defer to v0.8.x. Windows users install from sdist
with MSVC (which the source supports).

This unblocks the first PyPI ship: sdist + Linux x86_64/aarch64 + macOS
arm64 wheels.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: unamedkr

.github/workflows/publish.yml

@@ -33,8 +33,9 @@ jobs:
             arch: aarch64
           - os: macos-14      # Apple Silicon (M-series). Intel macs deferred.
             arch: arm64
-          - os: windows-latest
-            arch: AMD64
+          # Windows mingw64 wheel is deferred — quant.h's clock_gettime shim
+          # conflicts with mingw's native one. Windows users install via sdist
+          # with MSVC for now. Tracked for v0.8.x.
 
     steps:
       - name: Checkout