fix(ci): branch-scoped concurrency group and remove workflow self-trigger

- concurrency.group: 'release' -> github.workflow + github.ref_name
  Fixed group name caused any two runs to queue against each other regardless
  of branch. A manual dispatch would wait behind a failed push-triggered run.

- Remove '.github/workflows/build-and-release.yml' from push path filters
  Merging a workflow-fix PR was auto-triggering a full release build every time.
  Release builds should only fire on source/INI changes or manual dispatch.

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

@@ -9,7 +9,6 @@ on:
       - 'msi/**'
       - 'src-x86-x64-Fusix/**'
       - 'src-csharp/**'
-      - '.github/workflows/build-and-release.yml'
   workflow_dispatch:
     inputs:
       tag:
@@ -23,7 +22,7 @@ on:
         default: false
 
 concurrency:
-  group: release
+  group: ${{ github.workflow }}-${{ github.ref_name }}
   cancel-in-progress: true
 
 env: