fix: 报表预览报错0A000 DISCARD statement is not yet supported-PG连接串增加No Reset On Close=true(连接池回收不再发送DISCARD ALL,兼容PgBouncer/PolarDB等代理)

Co-Authored-By: Claude Code <noreply@anthropic.com>

Author: pythonHuang

Juggle.Application/Services/Flow/FlowExecutionService.cs

@@ -55,7 +55,7 @@ public static string BuildConnectionString(DataSourceEntity ds)
         {
             "sqlite"                       => $"Data Source={(string.IsNullOrEmpty(ds.DbName) ? "juggle.db" : ds.DbName)}",
             "mysql"                        => $"Server={ds.Host};Port={ds.Port};Database={ds.DbName};User={ds.Username};Password={ds.Password};CharSet=utf8mb4;",
-            "postgresql" or "postgres"     => $"Host={ds.Host};Port={ds.Port};Database={ds.DbName};Username={ds.Username};Password={ds.Password};",
+            "postgresql" or "postgres"     => $"Host={ds.Host};Port={ds.Port};Database={ds.DbName};Username={ds.Username};Password={ds.Password};No Reset On Close=true;",
             "sqlserver"  or "mssql"        => $"Server={ds.Host},{ds.Port};Database={ds.DbName};User Id={ds.Username};Password={ds.Password};TrustServerCertificate=True;",
             "oracle"                       => $"Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST={ds.Host})(PORT={ds.Port}))(CONNECT_DATA=(SID={ds.DbName})));User Id={ds.Username};Password={ds.Password};",
             "dm"                           => $"Server={ds.Host};Port={ds.Port};Database={ds.DbName};User Id={ds.Username};PWD={ds.Password};",

Juggle.Application/Services/Impl/ReportExecutionService.cs

@@ -385,7 +385,7 @@ private static IDbDataParameter CreateParameter(string name, object? value, stri
     {
         "sqlite" => $"Data Source={ds.DbName ?? "juggle.db"}",
         "mysql" => $"Server={ds.Host};Port={ds.Port};Database={ds.DbName};User={ds.Username};Password={ds.Password};CharSet=utf8mb4;",
-        "postgresql" or "postgres" => $"Host={ds.Host};Port={ds.Port};Database={ds.DbName};Username={ds.Username};Password={ds.Password};",
+        "postgresql" or "postgres" => $"Host={ds.Host};Port={ds.Port};Database={ds.DbName};Username={ds.Username};Password={ds.Password};No Reset On Close=true;",
         "sqlserver" or "mssql" => $"Server={ds.Host},{ds.Port};Database={ds.DbName};User Id={ds.Username};Password={ds.Password};TrustServerCertificate=True;",
         _ => throw new Exception($"Unsupported DB: {ds.DsType}")
     };