test(scheduler): nail H7 progress keep + H8 deferred task:state

Address Michał NEED-CHANGES on !7 tip f408da93: fail/defer omit-progress
preserves progress/stat_date; seed + quiet-window defer assert
status=deferred and future due_at on task:state. Soft: seeded due≠wall;
cleanup failure reads task:state.

tests/test_task_state.py

@@ -15,12 +15,14 @@ from reaction_board.database import Database  # noqa: E402
 from reaction_board.repository import Repository  # noqa: E402
 from reaction_board.scheduler import ScheduledTask, Scheduler  # noqa: E402
 from reaction_board.task_state import (  # noqa: E402
+    STATUS_DEFERRED,
     STATUS_DONE,
     STATUS_FAILED,
     STATUS_PENDING,
     STATUS_RUNNING,
     ensure_pending,
     load_state,
+    mark_deferred,
     mark_done,
     mark_failed,
     mark_running,
@@ -65,22 +67,26 @@ def test_restart_mid_run_resumes_same_stat_date():
 
 
 def test_seeded_before_snapshot_at_does_not_force_run():
-    """seed 后挂 pending due_at=当晚；白天重启 next_run 未到，不跑。"""
+    """seed 后挂 pending；白天重启认落盘 due_at（刻意 ≠ 墙钟）且未到不跑。"""
     with tempfile.TemporaryDirectory() as tmp:
         db, repo = _repo(tmp)
         try:
             now = datetime(2026, 11, 3, 10, 30, tzinfo=SHANGHAI_TZ).timestamp()
-            slot = datetime(2026, 11, 3, 23, 15, tzinfo=SHANGHAI_TZ).timestamp()
+            # 刻意偏离墙钟 23:15，证明认落盘而非 fallback
+            slot = datetime(2026, 11, 3, 22, 0, tzinfo=SHANGHAI_TZ).timestamp()
+            wall = next_daily_run(now, "23:15")
+            assert slot != wall
             ensure_pending(
                 repo, "snapshot", due_at=slot, stat_date="2026-11-03", now=now,
             )
             repo.kv_set("snapshot:seeded:2026-11-03", "1")
             nxt = startup_next_run(
                 repo, "snapshot",
-                wall_due_at=next_daily_run(now, "23:15"),
+                wall_due_at=wall,
                 now=now,
             )
             assert nxt == slot
+            assert nxt != wall
             assert nxt > now
             calls = []
 
@@ -199,6 +205,52 @@ def test_no_state_falls_back_to_wall_clock():
             db.close()
 
 
+
+def test_fail_or_defer_preserves_progress():
+    """H7: mark_failed / mark_deferred 不传 progress 时保留已有 progress 与 stat_date。"""
+    with tempfile.TemporaryDirectory() as tmp:
+        db, repo = _repo(tmp)
+        try:
+            now = datetime(2026, 11, 3, 12, 0, tzinfo=SHANGHAI_TZ).timestamp()
+            progress = {"done": 42, "total": 100, "cursor": "aid:99"}
+            mark_running(
+                repo, "snapshot", stat_date="2026-11-03", now=now,
+                progress=progress,
+            )
+            before = load_state(repo, "snapshot")
+            assert before is not None
+            assert before.progress == progress
+            assert before.stat_date == "2026-11-03"
+
+            due_fail = now + 300
+            mark_failed(
+                repo, "snapshot", due_at=due_fail, now=now + 1,
+                progress=None, error="boom",
+            )
+            failed = load_state(repo, "snapshot")
+            assert failed is not None
+            assert failed.status == STATUS_FAILED
+            assert failed.due_at == due_fail
+            assert failed.progress == progress
+            assert failed.stat_date == "2026-11-03"
+            assert failed.error == "boom"
+
+            due_defer = now + 600
+            mark_deferred(
+                repo, "snapshot", due_at=due_defer, now=now + 2,
+                progress=None, error="snapshot_quiet_window",
+            )
+            deferred = load_state(repo, "snapshot")
+            assert deferred is not None
+            assert deferred.status == STATUS_DEFERRED
+            assert deferred.due_at == due_defer
+            assert deferred.progress == progress
+            assert deferred.stat_date == "2026-11-03"
+            assert deferred.error == "snapshot_quiet_window"
+        finally:
+            db.close()
+
+
 def main_test():
     test_restart_mid_run_resumes_same_stat_date()
     test_seeded_before_snapshot_at_does_not_force_run()
@@ -206,6 +258,7 @@ def main_test():
     test_due_at_passed_runs_including_failed_retry()
     test_done_writes_next_due_and_blocks_until_then()
     test_no_state_falls_back_to_wall_clock()
+    test_fail_or_defer_preserves_progress()
     print("OK: task_state persistence / resume / due_at gates")