Fix duplicated CI jobs on tag push

Add tags-ignore to build-and-test.yml so tag pushes only trigger
the Release workflow (which calls build-and-test via workflow_call).

Author: fdcastel

.github/workflows/build-and-test.yml

@@ -5,6 +5,8 @@ on:
     # Run on all branches, but not on tags (release.yml handles tags)
     branches:
       - '**'
+    tags-ignore:
+      - '**'
   pull_request:
   workflow_call: