fix(tests): enable frontier_extend in test_build_tasks_all_enabled

`frontier_extend` (added on develop in ee9dfbe) defaults to `enabled=False` like `apply_grimoire_projects`, so the "all enabled" test needs to flip it on too — otherwise build_tasks() drops it and the equality against STEP_NAMES fails.

Author: caviri

tests/test_quest.py

@@ -111,6 +111,9 @@ def test_quest_config_rejects_removed_step_endpoints(tmp_path: Path) -> None:
 
 def test_build_tasks_all_enabled() -> None:
     cfg = QuestFileConfig()
+    # Both default to disabled — flip them on so the assertion below
+    # exercises every step in STEP_NAMES (the "all enabled" contract).
+    cfg.quest.steps.frontier_extend.enabled = True
     cfg.quest.steps.apply_grimoire_projects.enabled = True
     tasks = build_tasks(cfg)
     assert [t.name for t in tasks] == list(STEP_NAMES)