feat(execution,obs): 호가단위 스냅(dcy-030/#28) + 운영 관측성(dcy-029/#29) + REL-007 환류

dcy-030 (issue #28, P0 체결 복구):
- REQ-083 KRX 호가단위(tick) 순수 유틸 (domain/pricing.py)
- REQ-070 CHG: 슬리피지 실효가 호가단위 스냅 — 상한 준수(매수 floor/매도 ceil)
  + band<1tick 하한/상한 보장 + 부동소수 epsilon 가드. 147700→148400/54500→54700.
- BAT-044 release-candidate

dcy-029 (issue #29, 운영 관측성):
- REQ-084 구조화 로깅 기반 (runtime/logging_setup.py): ISO8601 KST·레벨·Loki JSON
  ·correlation id(slot_id)
- REQ-085 주문 결과 로깅 (event=order_submit|fill|reject)
- REQ-087 거부 ERROR 가시성 (조용한 롤백 제거)
- REQ-086 청산 reason+actor 동반 노출 (안전망/전략 구분, 신규 필드 없음)
- REQ-088 운영 조회 CLI report (application/operator_report.py, 보유·오늘 체결
  ·실현 PnL net·대기, direct-DB)
- REQ-089 운영자 런북 docs/operations.md
- REQ-090 baseline 정합 (runtime-flows·project-structure·interface-contract)
- BAT-045(P0)·BAT-046(P1) release-candidate

REL-007: confirmed → feedback-captured (운영 인스턴스 라이브 검증 + #28/#29 환류
정규화). BAT-037~041 released.

검증: 537 passed, 47 skipped, 회귀 0, ruff clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/runtime/test_logging_setup.py

@@ -0,0 +1,101 @@
+"""구조화 로깅 기반 단위 테스트 (REQ-084, dcy-029 FR-1·FR-7)."""
+import json
+import logging
+
+import pytest
+
+from trex_core.runtime import logging_setup as ls
+
+
+@pytest.fixture(autouse=True)
+def _reset_corr():
+    ls.set_correlation_id("")
+    yield
+    ls.set_correlation_id("")
+
+
+def _record(msg="hello", level=logging.INFO, **extra):
+    rec = logging.LogRecord("trex.test", level, __file__, 1, msg, None, None)
+    for k, v in extra.items():
+        setattr(rec, k, v)
+    return rec
+
+
+class TestTextFormatter:
+    def test_has_iso8601_kst_timestamp_level_and_msg(self):
+        out = ls.TextFormatter().format(_record("boot ok"))
+        # ISO8601 with +09:00 KST offset, level, message
+        assert "+09:00" in out
+        assert "INFO" in out
+        assert "boot ok" in out
+
+    def test_includes_correlation_id_when_set(self):
+        ls.set_correlation_id("slot-123")
+        rec = _record("x")
+        ls._CorrelationFilter().filter(rec)
+        out = ls.TextFormatter().format(rec)
+        assert "cid=slot-123" in out
+
+    def test_omits_cid_when_unset(self):
+        rec = _record("x")
+        ls._CorrelationFilter().filter(rec)
+        out = ls.TextFormatter().format(rec)
+        assert "cid=" not in out
+
+
+class TestJsonFormatter:
+    def test_is_valid_json_with_required_keys(self):
+        rec = _record("submitted")
+        ls._CorrelationFilter().filter(rec)
+        obj = json.loads(ls.JsonFormatter().format(rec))
+        assert obj["msg"] == "submitted"
+        assert obj["level"] == "INFO"
+        assert obj["logger"] == "trex.test"
+        assert "+09:00" in obj["ts"]
+        assert obj["correlation_id"] == ""
+
+    def test_correlation_id_propagates(self):
+        ls.set_correlation_id("slot-9")
+        rec = _record("y")
+        ls._CorrelationFilter().filter(rec)
+        obj = json.loads(ls.JsonFormatter().format(rec))
+        assert obj["correlation_id"] == "slot-9"
+
+    def test_extra_fields_included(self):
+        rec = _record("z", symbol="005930")
+        ls._CorrelationFilter().filter(rec)
+        obj = json.loads(ls.JsonFormatter().format(rec))
+        assert obj["symbol"] == "005930"
+
+
+class TestConfigureAndContext:
+    def test_configure_text_default(self, monkeypatch, capsys):
+        monkeypatch.delenv("TREX_LOG_FORMAT", raising=False)
+        ls.configure_logging(level=logging.INFO)
+        logging.getLogger("trex.x").info("via root")
+        err = capsys.readouterr().err
+        assert "via root" in err and "INFO" in err and "+09:00" in err
+
+    def test_configure_json_format(self, monkeypatch, capsys):
+        monkeypatch.setenv("TREX_LOG_FORMAT", "json")
+        ls.configure_logging(level=logging.INFO)
+        with ls.correlation_id("slot-77"):
+            logging.getLogger("trex.x").info("jsonline")
+        line = [ln for ln in capsys.readouterr().err.splitlines() if "jsonline" in ln][-1]
+        obj = json.loads(line)
+        assert obj["msg"] == "jsonline"
+        assert obj["correlation_id"] == "slot-77"
+        # cleanup: restore text formatter for other tests
+        monkeypatch.delenv("TREX_LOG_FORMAT", raising=False)
+        ls.configure_logging(level=logging.INFO)
+
+    def test_correlation_id_context_manager_restores(self):
+        ls.set_correlation_id("outer")
+        with ls.correlation_id("inner"):
+            assert ls.get_correlation_id() == "inner"
+        assert ls.get_correlation_id() == "outer"
+
+    def test_configure_is_idempotent_single_handler(self):
+        ls.configure_logging()
+        ls.configure_logging()
+        assert len(logging.getLogger().handlers) == 1