ci: add platform-specific bun install flags

.github/actions/setup-bun/action.yml

@@ -1,5 +1,10 @@
 name: "Setup Bun"
 description: "Setup Bun with caching and install dependencies"
+inputs:
+  install-flags:
+    description: "Additional flags to pass to 'bun install'"
+    required: false
+    default: ""
 runs:
   using: "composite"
   steps:
@@ -46,8 +51,8 @@ runs:
         # e.g. ./patches/ for standard-openapi
         # https://github.com/oven-sh/bun/issues/28147
         if [ "$RUNNER_OS" = "Windows" ]; then
-          bun install --linker hoisted
+          bun install --linker hoisted ${{ inputs.install-flags }}
         else
-          bun install
+          bun install ${{ inputs.install-flags }}
         fi
       shell: bash

.github/workflows/publish.yml

@@ -405,22 +405,28 @@ jobs:
           - host: macos-latest
             target: x86_64-apple-darwin
             platform_flag: --mac --x64
+            bun_install_flags: --os=darwin --cpu=x64
           - host: macos-latest
             target: aarch64-apple-darwin
             platform_flag: --mac --arm64
+            bun_install_flags: --os=darwin --cpu=arm64
           # github-hosted: blacksmith lacks ARM64 MSVC cross-compilation toolchain
           - host: "windows-2025"
             target: aarch64-pc-windows-msvc
             platform_flag: --win --arm64
+            bun_install_flags: --os=win32 --cpu=arm64
           - host: "blacksmith-4vcpu-windows-2025"
             target: x86_64-pc-windows-msvc
             platform_flag: --win
+            bun_install_flags: --os=win32 --cpu=x64
           - host: "blacksmith-4vcpu-ubuntu-2404"
             target: x86_64-unknown-linux-gnu
             platform_flag: --linux
+            bun_install_flags: --os=linux --cpu=x64
           - host: "blacksmith-4vcpu-ubuntu-2404"
             target: aarch64-unknown-linux-gnu
             platform_flag: --linux
+            bun_install_flags: --os=linux --cpu=arm64
     runs-on: ${{ matrix.settings.host }}
     steps:
       - uses: actions/checkout@v3