ci: completely ignore main branch so only tags and test branches trigger runners

.gitea/workflows/build-and-publish.yaml

@@ -2,18 +2,16 @@ name: MindSift CI & Docker Release
 
 on:
   push:
-    branches:
-      - '**'
+    branches-ignore:
+      - main
     tags:
       - '*'
-  pull_request:
-    branches:
-      - main
 
 jobs:
   test:
     name: Lint, Build & Unit Tests
     runs-on: ubuntu-latest
+    if: github.ref != 'refs/heads/main'
     steps:
       - name: Checkout Code
         uses: actions/checkout@v4
@@ -45,8 +43,7 @@ jobs:
     name: Build & Push Docker Image
     needs: test
     runs-on: ubuntu-latest
-    # Auf 'main' werden nur Tests ausgeführt — gebaut & gepusht wird nur bei Tags oder Test-/RC-Branches
-    if: github.event_name == 'push' && github.ref != 'refs/heads/main'
+    if: github.ref != 'refs/heads/main'
     steps:
       - name: Checkout Code
         uses: actions/checkout@v4