ci: add workflow_dispatch trigger to docker-publish

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: luarss

.github/workflows/docker-publish.yml

@@ -7,6 +7,13 @@ on:
         description: Docker image tag to publish (e.g. v0.1.0)
         required: true
         type: string
+  workflow_dispatch:
+    inputs:
+      image_tag:
+        description: Docker image tag to publish (e.g. v0.1.0)
+        required: true
+        type: string
+        default: "test"
 
 jobs:
   build-and-push: