use --column-inserts for plain sql

Author: mucsi96

server/src/main/java/io/github/mucsi96/postgresbackuptool/service/DatabaseService.java

@@ -89,15 +89,16 @@ public File createDump(String databaseName, int retentionPeriod,
                 List.of("pg_dump", "--dbname",
                         databaseConfiguration.getConnectionString(), "--schema",
                         databaseConfiguration.getSchema(), "--format", format,
-                        "--file", filename),
+                        "--file", filename,
+                        "plain".equals(format) ? "--column-inserts" : ""),
                 databaseConfiguration.getExcludeTables().stream()
                         .flatMap(table -> {
                             String fullTableName = databaseConfiguration
                                     .getSchema() + "." + table;
                             return List.of("--exclude-table", fullTableName)
                                     .stream();
                         }).toList())
-                .flatMap(x -> x.stream()).toList();
+                .flatMap(x -> x.stream()).filter(arg -> !arg.isEmpty()).toList();
 
         System.out.println("Creating dump: " + String.join(", ", commands));