fix(ci): address critical workflow and validation issues

Addresses code review feedback on PR #418:

CRITICAL FIXES:
1. Workflow trigger: Changed from release:published to push:tags
   - Enables "tag and publish in one step" workflow as intended
   - Automatically creates GitHub release on tag push
   - Removed redundant if condition (filtering now via trigger)
   - Added prerelease detection based on tag (-alpha, -beta, -rc)

2. Server path: Explicitly pass server_dir to make command
   - Fixes path mismatch between local (../../server) and CI
   - Uses absolute path: server_dir=${{ github.workspace }}/server
   - Prevents signing failures in GitHub Actions

3. Regex validation: Added test script for commitizen patterns
   - Validates scope filtering works correctly
   - Tests all three components: mcp, helm, astrolabe
   - Tests unscoped commits (default to mcp)
   - Tests breaking changes and invalid commits
   - Location: scripts/test-commitizen-scopes.sh

WORKFLOW IMPROVEMENTS:
- Release creation now automatic on tag push
- Better step naming for clarity
- Consistent prerelease handling across GitHub and App Store
- Explicit server_dir prevents reliance on fragile relative paths

All 16 test cases pass for scope filtering patterns.

.github/workflows/appstore-build-publish.yml

@@ -1,8 +1,9 @@
 name: Build and Publish Astrolabe App Release
 
 on:
-  release:
-    types: [published]
+  push:
+    tags:
+      - 'astrolabe-v*'
 
 env:
   APP_NAME: astrolabe
@@ -11,8 +12,6 @@ env:
 jobs:
   build-and-publish:
     runs-on: ubuntu-latest
-    # Only run on Astrolabe releases
-    if: startsWith(github.ref, 'refs/tags/astrolabe-v')
 
     steps:
       - name: Checkout code
@@ -66,15 +65,17 @@ jobs:
 
       - name: Build app store package
         working-directory: ${{ env.APP_DIR }}
-        run: make appstore
+        run: make appstore server_dir=${{ github.workspace }}/server
 
-      - name: Attach tarball to GitHub release
+      - name: Create GitHub release and attach tarball
         uses: svenstaro/upload-release-action@v2
         with:
           repo_token: ${{ secrets.GITHUB_TOKEN }}
           file: ${{ env.APP_DIR }}/build/artifacts/${{ env.APP_NAME }}.tar.gz
           asset_name: ${{ env.APP_NAME }}-${{ steps.tag.outputs.TAG }}.tar.gz
           tag: ${{ github.ref }}
+          release_name: Astrolabe ${{ steps.tag.outputs.TAG }}
+          prerelease: ${{ contains(steps.tag.outputs.TAG, '-alpha') || contains(steps.tag.outputs.TAG, '-beta') || contains(steps.tag.outputs.TAG, '-rc') }}
 
       - name: Upload to Nextcloud App Store
         uses: R0Wi/nextcloud-appstore-push-action@v1.0.6
@@ -83,4 +84,4 @@ jobs:
           appstore_token: ${{ secrets.APPSTORE_TOKEN }}
           download_url: ${{ github.server_url }}/${{ github.repository }}/releases/download/${{ github.ref_name }}/${{ env.APP_NAME }}-${{ steps.tag.outputs.TAG }}.tar.gz
           app_private_key: ${{ secrets.APP_PRIVATE_KEY }}
-          nightly: ${{ github.event.release.prerelease }}
+          nightly: ${{ contains(steps.tag.outputs.TAG, '-alpha') || contains(steps.tag.outputs.TAG, '-beta') || contains(steps.tag.outputs.TAG, '-rc') }}