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>

docker/docker-compose.yml

@@ -0,0 +1,43 @@
+name: acquire-core-x
+
+services:
+  db:
+    image: postgres:15
+    environment:
+      POSTGRES_DB: acq
+      POSTGRES_USER: acq
+      POSTGRES_PASSWORD: acq
+    # XA / 2-phase commit needs prepared transactions enabled.
+    command: ["-c", "max_prepared_transactions=100"]
+    volumes:
+      - ../db/schema.sql:/docker-entrypoint-initdb.d/10-schema.sql:ro
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U acq -d acq"]
+      interval: 3s
+      timeout: 3s
+      retries: 20
+    networks:
+      - acqnet
+
+  app:
+    image: acquire-x/endurox:7.0.12
+    depends_on:
+      db:
+        condition: service_healthy
+    # Enduro/X posix-mqueue runtime requirements (ndrxd won't boot otherwise).
+    sysctls:
+      fs.mqueue.msg_max: "512"
+      fs.mqueue.msgsize_max: "65536"
+    ulimits:
+      msgqueue: 536870912
+      nofile: 65536
+    volumes:
+      - ../app:/app
+    working_dir: /app
+    entrypoint: ["/bin/bash", "/app/entrypoint.sh"]
+    networks:
+      - acqnet
+
+networks:
+  acqnet:
+    driver: bridge