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>

trex_core/runtime/daemon.py

@@ -22,6 +22,7 @@ from __future__ import annotations
 import logging
 import signal
 import threading
+from datetime import datetime
 from datetime import time as time_cls
 from zoneinfo import ZoneInfo
 
@@ -144,6 +145,8 @@ class Daemon:
         self.intent_service = IntentService(
             self.slot_service, self.slot_repo, self.intent_store,
             resolve_symbol=self._resolve_symbol,
+            instance_key=config.instance_key,
+            max_active_slots=config.max_active_slots,  # dcy-020: asset-centric gate
         )
         self.broker = _build_broker(config)
         self.outbox = PostgreSQLLedgerOutbox(config.dsn)
@@ -173,6 +176,11 @@ class Daemon:
             store=self.snapshot_store,
             broker=self.broker,
             schedule_kst=_parse_kst_time(config.snapshot_schedule.kst_time),
+            # dcy-020 / REQ-058 (BAT-028): asset-centric slot reconcile when M set.
+            slot_repo=self.slot_repo,
+            instance_key=config.instance_key,
+            reconcile_enabled=config.max_active_slots is not None,
+            trading_date_fn=(lambda: datetime.now(ZoneInfo(config.trading_timezone)).date()),
         )
         # dcy-014 / REQ-005: daily slot preallocation in the configured
         # trading timezone (default KST), so trading_date matches the local