Fix OpenBLAS version for vcpkg compatibility

- Update OpenBLAS version from 0.3.0 to 0.3.29 (latest in vcpkg)
- Add version override to ensure exact 0.3.29 is used
- Fixes vcpkg install failure: "no version database entry for openblas at 0.3.0"
- OpenBLAS 0.3.29 includes ARM64 performance optimizations

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: Sol455

lib/vcpkg.json

@@ -6,7 +6,7 @@
       { "name": "rapidjson", "version>=": "1.1.0" },
       { "name": "asio", "version>=": "1.28.0" },
       { "name": "cpp-httplib", "version>=": "0.12.2" },
-      { "name": "openblas", "version>=": "0.3.0" },
+      { "name": "openblas", "version>=": "0.3.29" },
       { "name": "armadillo", "version>=": "12.0.1" },
       { "name": "ryml", "version>=": "0.5.0" }
   ],
@@ -16,6 +16,7 @@
     { "name": "rapidjson", "version": "1.1.0" },
     { "name": "asio", "version": "1.28.0" },
     { "name": "cpp-httplib", "version": "0.12.2" },
+    { "name": "openblas", "version": "0.3.29" },
     { "name": "armadillo", "version": "12.0.1" },
     { "name": "ryml", "version": "0.5.0" }
   ]