test Depot runners for team commits (#6394)

Co-authored-by: ConnorYoh <[email protected]>

settings.gradle

@@ -23,6 +23,29 @@ plugins {
     id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
 }
 
+// Depot remote build cache. Silently no-ops when DEPOT_TOKEN is absent
+// (local dev without depot login, and fork PRs where GitHub hides secrets),
+// so contributors without Depot access still build fine on local cache only.
+buildCache {
+    def depotToken = System.getenv('DEPOT_TOKEN')
+    local {
+        enabled = true
+    }
+    if (depotToken) {
+        remote(HttpBuildCache) {
+            url = 'https://cache.depot.dev'
+            enabled = true
+            // Only CI runs push to the shared cache; dev laptops pull-only
+            // so a misconfigured local task can't poison everyone else.
+            push = System.getenv('CI') == 'true'
+            credentials {
+                username = ''
+                password = depotToken
+            }
+        }
+    }
+}
+
 rootProject.name = 'Stirling PDF'
 
 // Flavors: core | proprietary (default) | saas.