Update CI workflow to run on release/* branches and remove develop

Enable build and tests on release/* branches to support release workflows.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: paulirwin

.github/workflows/dotnet.yml

@@ -2,9 +2,10 @@ name: .NET
 
 on:
   push:
-    branches: [ main, develop ]
+    branches: [ main, 'release/*' ]
   pull_request:
-    branches: [ main, develop ]
+    branches: [ main, 'release/*' ]
+  workflow_dispatch:
 
 jobs:
   build: