Add instant Incus sync trigger on ct/install changes

Fire a repository_dispatch (proxmoxve-scripts-changed) to
community-scripts/Incus whenever a ct/ or install/ script changes on main,
so the mirror tracks upstream within minutes instead of waiting for its
daily cron. The mirroring + bootstrap rewrite stays in the Incus repo as the
single source of truth.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A1R2A9UYwyL1FwcsADzSWU

.github/workflows/sync-to-incus.yml

@@ -0,0 +1,49 @@
+name: Sync ct/install to Incus
+
+# When a ct/*.sh or install/*.sh file changes on main, trigger the Incus repo's
+# own sync workflow immediately instead of waiting for its daily 04:00 cron.
+#
+# The actual mirroring + transformation lives in community-scripts/Incus
+# (.github/workflows/sync-scripts.yml): it rewrites each script's bootstrap line
+# to load the engine from community-scripts/core (ProxmoxVE's misc/build.func is
+# a monolith with no Incus backend), so a plain 1:1 copy would break every Incus
+# script. We therefore only fire a repository_dispatch and let that single
+# source of truth do the work (and auto-approve + merge its own PR).
+#
+# Auth: secrets.PAT_AUTOMERGE (org secret, scope ALL) - the same dedicated-PAT
+# convention the Incus repo already uses to dispatch to core. It needs
+# contents:write on community-scripts/Incus.
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "ct/**.sh"
+      - "install/**.sh"
+  workflow_dispatch:
+
+concurrency:
+  group: sync-to-incus
+  cancel-in-progress: false
+
+jobs:
+  dispatch:
+    if: github.repository == 'community-scripts/ProxmoxVE'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Trigger Incus sync workflow
+        env:
+          GH_TOKEN: ${{ secrets.PAT_AUTOMERGE }}
+          SOURCE_SHA: ${{ github.sha }}
+        run: |
+          set -euo pipefail
+          if [ -z "${GH_TOKEN:-}" ]; then
+            echo "::error::PAT_AUTOMERGE is not available to this repo."
+            exit 1
+          fi
+          echo "Dispatching proxmoxve-scripts-changed to community-scripts/Incus (from ${SOURCE_SHA})"
+          gh api repos/community-scripts/Incus/dispatches \
+            -X POST \
+            -f "event_type=proxmoxve-scripts-changed" \
+            -F "client_payload[sha]=${SOURCE_SHA}"