Add build disclaimer to workflow run summary

Author: danrmiller

.github/workflows/build.yaml

@@ -19,6 +19,19 @@ on:
 
 jobs:
 
+  build-disclaimer:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Post tester disclaimer
+        run: |
+          cat >> $GITHUB_STEP_SUMMARY << 'EOF'
+          > [!CAUTION]
+          > **These are unverified, unsupported development builds — not official releases.**
+          > They have not undergone QA testing and may contain bugs or incomplete features.
+          > Download and use entirely at your own risk. Do not use with real funds.
+          > Official releases are published on the [Releases page](https://github.com/cypherstack/stack_wallet/releases).
+          EOF
+
   build-linux:
     runs-on: ubuntu-24.04
     permissions: