feat: initialize ERP base platform (extracted from HMS)

- Stripped 11 business crates (health, ai, dialysis, plugins)
- Cleaned AppState, AppConfig, main.rs from business coupling
- Reduced migrations from 169 to 53 (base-only)
- Removed health_provider trait from erp-core
- Removed business integration tests
- Removed gateway rate limiting middleware
- Base capabilities: auth, RBAC, JWT, config, workflow, message, plugin, audit, crypto, RLS, multi-tenant

Cargo check: OK
Cargo test: OK

docker/docker-compose.yml

@@ -0,0 +1,50 @@
+version: "3.8"
+
+# WARNING: 生产环境必须通过 .env 文件或环境变量覆盖默认密码
+# 不要在生产环境使用默认密码
+
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: erp-postgres
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-erp}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-erp_dev_2024}
+      POSTGRES_DB: ${POSTGRES_DB:-erp}
+    expose:
+      - "5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-erp}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    deploy:
+      resources:
+        limits:
+          cpus: "1.0"
+          memory: 512M
+
+  redis:
+    image: redis:7-alpine
+    container_name: erp-redis
+    command: redis-server --requirepass ${REDIS_PASSWORD:-erp_redis_dev} --appendonly yes
+    expose:
+      - "6379"
+    volumes:
+      - redis_data:/data
+    healthcheck:
+      test: ["CMD", "redis-cli", "-a", "${REDIS_PASSWORD:-erp_redis_dev}", "ping"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    deploy:
+      resources:
+        limits:
+          cpus: "1.0"
+          memory: 512M
+
+volumes:
+  postgres_data:
+  redis_data: