fix: remove stale build artifacts from releases/ and add cleanup to Alpine build

- Add /releases/ to .gitignore to prevent tracking build artifacts
- Remove old 1.0.0 .deb files from git tracking
- Add stale .apk cleanup to build-alpine.sh (matching build-arch.sh)
- Add cleanup step to CI Alpine workflow to remove stale packages

Fixes Alpine package version mismatch caused by old artifacts in releases/

build-alpine.sh

@@ -8,6 +8,10 @@ set -e
 echo "=== Linux Patch API - Alpine Build Script ==="
 echo ""
 
+# Clean stale packages from previous builds
+rm -f releases/linux-patch-api-*.apk 2>/dev/null || true
+rm -f /home/builduser/packages/home/x86_64/linux-patch-api-*.apk 2>/dev/null || true
+
 # Source cargo environment (for rustup-installed toolchain in CI)
 if [ -f "$HOME/.cargo/env" ]; then
     . "$HOME/.cargo/env"