fix(tooling): cargo fmt + godot-cold-parse cache restore (gate round)

fmt: atlas_data_proxy.rs test code. godot-cold-parse: the cold parse re-seeds the class cache WITHOUT addon classes (gdUnit4's GdUnitTestCIRunner missing), leaving tests/run-godot unable to start (0 tests / 355ms — caught by the pre-push gate running the suite right after this script). The script now restores a full cache via a final --import pass before exiting; the cold verdict is unaffected.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tooling/godot-cold-parse

@@ -84,4 +84,13 @@ if [ -n "$MATCHES" ]; then
     echo "$MATCHES"
     exit 1
 fi
+
+# Restore a FULL class cache before exiting: the cold parse run re-seeds
+# global_script_class_cache.cfg only partially — addon classes (e.g. gdUnit4's
+# GdUnitTestCIRunner) are missing, which leaves tests/run-godot unable to even
+# start (0 tests in ~350ms; found live when the pre-push gate ran the suite
+# right after this script, 2026-07-14). The cold verdict above is already
+# decided; this restore just returns the tree to a runnable state.
+godot --headless --path "$REPO_ROOT/client" --import > /dev/null 2>&1 || true
+
 echo "godot-cold-parse: clean"