fix: Alpine build - truncated YAML and wrong abuild output path

Root causes of ALL Alpine build failures:
1. ci.yml: Verify Alpine package step was TRUNCATED at line 339 -
   missing closing quote, then clause, fi, and entire upload step.
   This caused YAML parse failure every run.
2. build-alpine.sh: Copy path was /home/builduser/packages/home/x86_64/
   but abuild outputs to /home/builduser/packages/builduser/x86_64/.
   The find fallback caught stale packages from previous builds.

Fixes:
- Complete the Verify Alpine package step with proper if/fi
- Add Upload to Gitea Release step for Alpine (was completely missing)
- Fix abuild output path in build-alpine.sh

build-alpine.sh

@@ -147,8 +147,9 @@ if [ "$(id -u)" = "0" ]; then
     su - builduser -c "cd $WORKSPACE_DIR && abuild checksum && abuild -d"
     
     # Copy APK from builduser packages to releases
+    # Note: abuild outputs to /home/builduser/packages/builduser/x86_64/ not /home/builduser/packages/home/x86_64/
     mkdir -p releases
-    cp /home/builduser/packages/home/x86_64/*.apk releases/ 2>/dev/null || find /home/builduser/packages -name "*.apk" -exec cp {} releases/ \; 2>/dev/null || true
+    cp /home/builduser/packages/builduser/x86_64/*.apk releases/ 2>/dev/null || find /home/builduser/packages -name "*.apk" -exec cp {} releases/ \; 2>/dev/null || true
 else
     cd "$WORKSPACE_DIR"
     abuild checksum