fix: set cppstd=17 in default Conan profile for Windows builds

conan_provider.cmake passes --profile:build=default to conan install.
The auto-detected default on MSVC always sets compiler.cppstd=14, which
fails validation for protobuf/6.33.5 (requires C++17) when used as a
build/tool requirement.

Pre-creating the default profile with cppstd=17 before CMake runs ensures
both the host and build profiles agree on the C++ standard.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leoparente

.github/workflows/build-develop.yml

@@ -121,6 +121,12 @@ jobs:
         id: conan
         uses: turtlebrowser/get-conan@c171f295f3f507360ee018736a6608731aa2109d #v1.2
 
+      - name: Setup Conan Profile
+        shell: bash
+        run: |
+          conan profile detect --force
+          sed -i 's/compiler.cppstd=14/compiler.cppstd=17/' "$(conan profile path default)"
+
       - name: Setup Conan Cache
         uses: actions/cache@v4
         with:

.github/workflows/build-release.yml

@@ -168,6 +168,12 @@ jobs:
         id: conan
         uses: turtlebrowser/get-conan@c171f295f3f507360ee018736a6608731aa2109d #v1.2
 
+      - name: Setup Conan Profile
+        shell: bash
+        run: |
+          conan profile detect --force
+          sed -i 's/compiler.cppstd=14/compiler.cppstd=17/' "$(conan profile path default)"
+
       - name: Setup Conan Cache
         uses: actions/cache@v4
         with: