test: speed up cron and restart timing tests

Replace fixed sleep-based waits with condition polling in cron tests and mock the restart delay in CLI restart tests to reduce suite runtime without changing behavior.

tests/cron/test_cron_service.py

@@ -8,6 +8,15 @@ from nanobot.cron.service import CronService
 from nanobot.cron.types import CronJob, CronPayload, CronSchedule
 
 
+async def _wait_until(predicate, *, timeout: float = 1.0, interval: float = 0.01) -> None:
+    deadline = time.monotonic() + timeout
+    while time.monotonic() < deadline:
+        if predicate():
+            return
+        await asyncio.sleep(interval)
+    assert predicate()
+
+
 def test_add_job_rejects_unknown_timezone(tmp_path) -> None:
     service = CronService(tmp_path / "cron" / "jobs.json")
 
@@ -201,18 +210,18 @@ async def test_start_server_not_jobs(tmp_path):
     async def on_job(job):
         called.append(job.name)
 
-    service = CronService(store_path, on_job=on_job, max_sleep_ms=1000)
+    service = CronService(store_path, on_job=on_job, max_sleep_ms=100)
     await service.start()
     assert len(service.list_jobs()) == 0
 
     service2 = CronService(tmp_path / "cron" / "jobs.json")
     service2.add_job(
         name="hist",
-        schedule=CronSchedule(kind="every", every_ms=500),
+        schedule=CronSchedule(kind="every", every_ms=100),
         message="hello",
     )
     assert len(service.list_jobs()) == 1
-    await asyncio.sleep(2)
+    await _wait_until(lambda: bool(called), timeout=0.8)
     assert len(called) != 0
     service.stop()
 
@@ -248,10 +257,10 @@ async def test_running_service_picks_up_external_add(tmp_path):
     async def on_job(job):
         called.append(job.name)
 
-    service = CronService(store_path, on_job=on_job)
+    service = CronService(store_path, on_job=on_job, max_sleep_ms=100)
     service.add_job(
         name="heartbeat",
-        schedule=CronSchedule(kind="every", every_ms=150),
+        schedule=CronSchedule(kind="every", every_ms=100),
         message="tick",
     )
     await service.start()
@@ -261,11 +270,11 @@ async def test_running_service_picks_up_external_add(tmp_path):
         external = CronService(store_path)
         external.add_job(
             name="external",
-            schedule=CronSchedule(kind="every", every_ms=150),
+            schedule=CronSchedule(kind="every", every_ms=100),
             message="ping",
         )
 
-        await asyncio.sleep(2)
+        await _wait_until(lambda: "external" in called, timeout=0.8)
         assert "external" in called
     finally:
         service.stop()
@@ -287,16 +296,16 @@ async def test_add_job_during_jobs_exec(tmp_path):
             )
             run_once = False
 
-    service = CronService(store_path, on_job=on_job)
+    service = CronService(store_path, on_job=on_job, max_sleep_ms=100)
     service.add_job(
         name="heartbeat",
-        schedule=CronSchedule(kind="every", every_ms=150),
+        schedule=CronSchedule(kind="every", every_ms=100),
         message="tick",
     )
     assert len(service.list_jobs()) == 1
     await service.start()
     try:
-        await asyncio.sleep(3)
+        await _wait_until(lambda: len(service.list_jobs()) == 2, timeout=0.8)
         jobs = service.list_jobs()
         assert len(jobs) == 2
         assert "test" in [j.name for j in jobs]