ci: fix release workflow asset upload

.github/workflows/release.yml

@@ -4,15 +4,27 @@ on:
   push:
     tags:
       - 'v*'
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Existing tag to build and upload assets for (e.g. v0.1.0)'
+        required: true
+        type: string
 
 env:
   CARGO_TERM_COLOR: always
 
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    env:
+      RELEASE_TAG: ${{ inputs.tag || github.ref_name }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: ${{ env.RELEASE_TAG }}
 
       - name: Set up Rust 1.80
         uses: dtolnay/rust-toolchain@master
@@ -23,6 +35,9 @@ jobs:
       - name: Install musl-tools
         run: sudo apt-get update && sudo apt-get install -y musl-tools
 
+      - name: Ensure musl target installed
+        run: rustup target add x86_64-unknown-linux-musl
+
       - name: Cache cargo build
         uses: actions/cache@v4
         with:
@@ -40,7 +55,7 @@ jobs:
 
       - name: Get version from tag
         id: version
-        run: echo "VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+        run: echo "VERSION=${{ env.RELEASE_TAG }}" >> "$GITHUB_OUTPUT"
 
       - name: Prepare release artifact
         run: |
@@ -51,6 +66,7 @@ jobs:
       - name: Create GitHub Release
         uses: softprops/action-gh-release@v2
         with:
+          tag_name: ${{ steps.version.outputs.VERSION }}
           files: |
             release/pbkfs-${{ steps.version.outputs.VERSION }}-linux-x86_64
             release/checksums.txt