fix(deploy): explain missing RDS database to administrators

deploy/dobotai-dingtalk/rds-schema-init.sh

@@ -17,7 +17,18 @@ if not (url.startswith('postgres://') or url.startswith('postgresql://')): raise
 Path(sys.argv[2]).write_text('DATABASE_URL='+url+'\n',encoding='utf-8'); os.chmod(sys.argv[2],0o600)
 PY
 rds_shell() { docker run --rm -i --network host --env-file "$temp_env" postgres:16-alpine sh -ec "$1"; }
-rds_shell 'pg_isready -d "$DATABASE_URL" >/dev/null'
+rds_shell 'pg_isready -d "$DATABASE_URL" >/dev/null' || true
+if ! probe_error="$(rds_shell 'exec psql -At -v ON_ERROR_STOP=1 "$DATABASE_URL" -c "SELECT 1"' 2>&1)"; then
+  case "$probe_error" in
+    *"does not exist"*|*"不存在"*)
+      echo "阿里云RDS目标数据库不存在；请RDS管理员创建DobotAI专用数据库并授予应用账号连接和建表权限。" >&2
+      ;;
+    *)
+      echo "无法连接阿里云RDS目标数据库；请管理员检查网络、白名单、TLS、账号权限和连接串。" >&2
+      ;;
+  esac
+  exit 1
+fi
 sql() { rds_shell 'exec psql -v ON_ERROR_STOP=1 "$DATABASE_URL"'; }
 sql_at() { rds_shell 'exec psql -At -v ON_ERROR_STOP=1 "$DATABASE_URL"'; }
 state=$(printf "%s\n" "WITH expected(name) AS (VALUES ('turns'),('session_mappings'),('messages'),('coverage_decisions'),('support_cases'),('system_config_revisions'),('administrators'),('setting_sessions'),('user_preferences'),('reasoning_mode_states'),('reasoning_mode_turns')) SELECT CASE WHEN to_regclass('public.turns') IS NULL AND (SELECT COUNT(*) FROM information_schema.tables WHERE table_schema='public')=0 THEN 'empty' WHEN (SELECT COUNT(*) FROM expected e JOIN information_schema.tables t ON t.table_schema='public' AND t.table_name=e.name)=11 THEN 'normal' ELSE 'inconsistent' END;" | sql_at)

scripts/containerized_deployment_test.go

@@ -46,7 +46,7 @@ func TestRDSInitializerOnlyInitializesEmptySchemaAndRejectsInconsistentSchema(t
 		t.Fatal(err)
 	}
 	source := string(data)
-	for _, required := range []string{"pg_isready", "to_regclass('public.turns')", "empty", "normal", "inconsistent", "*.up.sql", "DATABASE_URL", "postgres:16-alpine"} {
+	for _, required := range []string{"pg_isready", "to_regclass('public.turns')", "empty", "normal", "inconsistent", "数据库不存在", "*.up.sql", "DATABASE_URL", "postgres:16-alpine"} {
 		if !strings.Contains(source, required) {
 			t.Errorf("RDS initializer missing %q", required)
 		}