feat(slot): BAT-028 M2/M3 — universe reconcile + 자산 중심 admission (dcy-020/REQ-058·059)

config 게이트 이중 경로(max_active_slots 설정 시 자산 중심, 미설정 시 legacy pool).
운영 데몬은 cutover(BAT-δ) 전까지 pool 무중단.

- repository: find_slot_by_portfolio·count_active(holding+pending_buy+pending_sell)·
  reconcile_universe(생성 멱등/soft-retire/tombstone, allow_retire 가드) — protocol+in_memory+PG
  (PG: ON CONFLICT (instance_key, portfolio_id) WHERE portfolio_id IS NOT NULL)
- snapshot_scheduler: run_once swap 직후 _reconcile_slots(빈 universe skip, ≥50%↓ retire 보류)
- intents: _admit_buy 모드 분기 + _admit_buy_asset_centric(활성화/already_active/
  capacity_full/unknown_portfolio/over-cap, 인스턴스 lock)
- daemon: instance_key·max_active_slots·reconcile_enabled·trading_date_fn 배선
- 신규 테스트: test_universe_reconcile(6), test_asset_centric_admission(6), PG reconcile(1)

검증: 단위 387 passed / 35 skipped, PG-gated 17 passed, ruff clean. legacy 무파손.
REQ-058/059/060 은 Approved 유지(자산 중심 경로 도입 검증; default 전환·cutover 는 BAT-δ).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/adapters/persistence/test_postgresql_repository.py

@@ -24,6 +24,24 @@ def _wire(dsn):
     return repo, svc, intents
 
 
+def test_universe_reconcile_pg(pg_clean):
+    # dcy-020/REQ-058 (BAT-028): validate reconcile against real PG, esp. the
+    # ON CONFLICT (instance_key, portfolio_id) WHERE portfolio_id IS NOT NULL
+    # partial-index upsert + find_slot_by_portfolio/count_active.
+    repo = PostgreSQLSlotRepository(pg_clean)
+    inst = "inst-pg"
+    r1 = repo.reconcile_universe(inst, DAY, {"pf-a", "pf-b"})
+    assert r1["created"] == 2
+    r2 = repo.reconcile_universe(inst, DAY, {"pf-a", "pf-b"})  # idempotent (ON CONFLICT)
+    assert r2["created"] == 0
+    assert repo.find_slot_by_portfolio(inst, "pf-a") is not None
+    assert repo.count_active(inst) == 0
+    # pf-b leaves universe while inactive -> soft-retire
+    r3 = repo.reconcile_universe(inst, DAY, {"pf-a"})
+    assert r3["retired"] == 1
+    assert repo.find_slot_by_portfolio(inst, "pf-b").retired_at is not None
+
+
 def test_preallocate_and_capacity(pg_clean):
     repo, svc, _ = _wire(pg_clean)
     assert svc.preallocate_daily_slots(DAY, 10) == 10