ci(deploy): skip deployments for graph-only commits

graphify-out is documentation about the repository and is not part of the SCP
source list, so a commit that only refreshes the graph deploys byte-identical
content and restarts the service for nothing. paths-ignore only skips the run
when every changed path matches, so a commit touching both the graph and the
app still deploys.

Author: Musiker15

.github/workflows/deploy.yml

@@ -4,6 +4,12 @@ on:
   push:
     branches:
       - main
+    # The code graph is documentation about the repository, it is never shipped.
+    # A commit that only refreshes it has nothing to deploy. Note that this only
+    # skips the run when every changed path matches: a commit touching both the
+    # graph and the app still deploys.
+    paths-ignore:
+      - 'graphify-out/**'
 
 permissions:
   contents: read