ci(release): add workflow_dispatch for manual trigger

Author: bug-ops

.github/workflows/release.yml

@@ -4,6 +4,12 @@ on:
   push:
     tags:
       - 'v*.*.*'
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Tag to release (e.g., v0.6.0)'
+        required: true
+        type: string
 
 env:
   CARGO_TERM_COLOR: always