Issue #33: Only build wheels on tagged releases and manual dispatch.

Author: MattClarkson

.github/workflows/build.yml

@@ -6,6 +6,7 @@ on:
     tags: ["v*"]
   pull_request:
     branches: [master, main]
+  workflow_dispatch:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -45,10 +46,12 @@ jobs:
 
   # =========================================================================
   # Build wheels: Python 3.9-3.13 on all platforms
+  # Only runs on tagged releases or manual dispatch.
   # 3.9 and 3.10 are optional (failures don't block the overall build)
   # =========================================================================
   build-wheels:
     name: Wheels ${{ matrix.python.version }} (${{ matrix.os }})${{ matrix.python.optional && ' [optional]' || '' }}
+    if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
     needs: [test-cpp]
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.python.optional }}