Phase 1: 실동작 Enduro/X + PostgreSQL XA 매입 슬라이스

- Enduro/X 7.0.12 소스빌드 이미지(-DENABLE_POSTGRES=ON, libndrxxaecpg XA 스위치)
- docker-compose: postgres(max_prepared_transactions=100) + endurox app
- ECPG XA 서비스 3종: ACQUIRE→RECONCILE→SETTLE (tpservice + EXEC SQL)
- 클라이언트 tpbegin/tpcall체인/tpcommit → tmsrv 2PC(prepare/commit) 원자 커밋
- 검증: 서비스 AVAIL, 커밋 row(status=S) psql 확인, 롤백 시 무잔존, pg_prepared_xacts=0
- 규명된 런타임 요건: sysctl fs.mqueue.*, ulimit msgqueue/nofile, XA open-str JSON
- docs/architecture.md, README, service-catalog 설계

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

app/ubftab/acq.fd

@@ -0,0 +1,13 @@
+$/* @(#) Acquiring (카드 매입) UBF field table */
+*base 6000
+
+# name           id   type    flag  comment
+T_MERCHANT       1    string   -     -
+T_AMOUNT         2    long     -     -
+T_FEE            3    long     -     -
+T_NET            4    long     -     -
+T_STATUS         5    string   -     -
+T_PURCHASE_ID    6    long     -     -
+T_BIZDATE        7    string   -     -
+T_SETTLE_ID      8    long     -     -
+T_MSG            9    string   -     -

app/ubftab/acq.fd.h

@@ -0,0 +1,12 @@
+/* @(#) Acquiring (카드 매입) UBF field table */
+/*	fname	bfldid            */
+/*	-----	-----            */
+#define	T_MERCHANT	((BFLDID32)167778161)	/* number: 6001	 type: string */
+#define	T_AMOUNT	((BFLDID32)33560434)	/* number: 6002	 type: long */
+#define	T_FEE	((BFLDID32)33560435)	/* number: 6003	 type: long */
+#define	T_NET	((BFLDID32)33560436)	/* number: 6004	 type: long */
+#define	T_STATUS	((BFLDID32)167778165)	/* number: 6005	 type: string */
+#define	T_PURCHASE_ID	((BFLDID32)33560438)	/* number: 6006	 type: long */
+#define	T_BIZDATE	((BFLDID32)167778167)	/* number: 6007	 type: string */
+#define	T_SETTLE_ID	((BFLDID32)33560440)	/* number: 6008	 type: long */
+#define	T_MSG	((BFLDID32)167778169)	/* number: 6009	 type: string */