fix(v2-scheduler): avoid restart loops when scheduler is disabled

tests/test_scheduler_operational_safety.py

@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+import os
+import subprocess
+import time
+from pathlib import Path
+
+
+def _repo_root() -> Path:
+    return Path(__file__).resolve().parent.parent
+
+
+def test_scheduler_disabled_mode_stays_alive_without_exit_loop():
+    env = os.environ.copy()
+    env["SCHEDULER_ENABLED"] = "0"
+    env["SCHEDULER_DISABLED_SLEEP_SECONDS"] = "30"
+
+    process = subprocess.Popen(
+        ["sh", "scripts/scheduler.sh"],
+        cwd=_repo_root(),
+        env=env,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        text=True,
+    )
+    try:
+        time.sleep(1.0)
+        assert process.poll() is None
+    finally:
+        process.terminate()
+        process.wait(timeout=5)
+
+
+def test_scheduler_compose_service_is_profile_gated():
+    compose_text = (_repo_root() / "docker-compose.yml").read_text(encoding="utf-8")
+    assert 'profiles: ["scheduler"]' in compose_text
+    assert "restart: unless-stopped" in compose_text
+
+
+def test_scheduler_script_declares_idle_disabled_behavior():
+    scheduler_script = (_repo_root() / "scripts/scheduler.sh").read_text(encoding="utf-8")
+    assert "Entering idle mode" in scheduler_script
+    assert "SCHEDULER_DISABLED_SLEEP_SECONDS" in scheduler_script