Add manual workflow dispatch trigger to release workflow

Allow manual triggering of release workflow for testing and emergency releases.
This helps debug why automatic PR close events aren't triggering the workflow.

Usage: Manually run workflow from Actions tab with PR number.

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

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

Author: kompre

.github/workflows/release.yml

@@ -4,10 +4,16 @@ on:
   pull_request:
     types: [closed]
     branches: [main]
+  workflow_dispatch:
+    inputs:
+      pr_number:
+        description: 'PR number to release'
+        required: true
+        type: number
 
 jobs:
   check-release-label:
-    if: github.event.pull_request.merged == true
+    if: github.event_name == 'workflow_dispatch' || github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     outputs:
       should-release: ${{ steps.check.outputs.release }}
@@ -21,7 +27,14 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
-          LABELS=$(gh pr view ${{ github.event.pull_request.number }} --json labels --jq '.labels[].name')
+          # Get PR number from event or input
+          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            PR_NUMBER=${{ inputs.pr_number }}
+          else
+            PR_NUMBER=${{ github.event.pull_request.number }}
+          fi
+
+          LABELS=$(gh pr view $PR_NUMBER --json labels --jq '.labels[].name')
 
           if echo "$LABELS" | grep -q "^release$"; then
             echo "release=true" >> $GITHUB_OUTPUT