Add RPM target for Linux, install 7z fallback on Windows

- Add rpm to bundle targets and install rpm on Linux CI
- Upload both .deb and .rpm from Linux build
- Install 7-Zip via choco if not already available on Windows runner

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

.gitea/workflows/release.yml

@@ -133,7 +133,7 @@ jobs:
 
       - name: Install system dependencies
         run: |
-          sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf xdg-utils
+          sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf xdg-utils rpm
 
       - name: Install npm dependencies
         run: npm ci
@@ -163,7 +163,7 @@ jobs:
 
           echo "Release ID: ${RELEASE_ID}"
 
-          find src-tauri/target/release/bundle -type f -name "*.deb" | while IFS= read -r file; do
+          find src-tauri/target/release/bundle -type f \( -name "*.deb" -o -name "*.rpm" \) | while IFS= read -r file; do
             filename=$(basename "$file")
             encoded_name=$(echo "$filename" | sed 's/ /%20/g')
             echo "Uploading ${filename} ($(du -h "$file" | cut -f1))..."
@@ -223,6 +223,9 @@ jobs:
         shell: powershell
         run: |
           # Compress-Archive has a 2GB limit; use 7z for CUDA builds
+          if (-not (Get-Command 7z -ErrorAction SilentlyContinue)) {
+            choco install 7zip -y
+          }
           7z a -tzip -mx=5 src-tauri\sidecar.zip .\python\dist\voice-to-notes-sidecar\*
 
       # ── Tauri app ──