Records are dumped without retry when PostgreSQL temporarily shuts down during insertion

I have an input file containing about 400k lines, one JSON entry per line, read using the `tail` input, and I am using SQL output into Postgres. In normal conditions all entries are properly inserted.

However I need to make sure that a sudden stop of PostgreSQL will not lead to a loss of records by Fluentd and that these records will be retried. When I tried stopping PostgreSQL at a random moment during the insertion, about 9k entries were dumped because the plugin classified these errors as "deterministic errors":

```
2023-09-13 19:09:51 +0200 [warn]: #0 Got deterministic error. Fallback to one-by-one import error_class=ActiveRecord::StatementInvalid error="PG::ConnectionBad: PQconsumeInput() FATAL: terminating connection due to administrator command\nSSL connection has been closed unexpectedly\n"
2023-09-13 19:09:51 +0200 [error]: #0 Got deterministic error again. Dump a record error_class=ActiveRecord::StatementInvalid error="PG::ConnectionBad: PQsocket() can't get socket descriptor" record=#
```

and 9k more `Got deterministic error again` messages with a dump of the record. After that, the Postgres connection error was detected and the plugin retried as it should until Postgres comes back up, and the rest of the records are inserted but the dumped ones are lost.

The behaviour I expect is that no records should be dumped in case Postgres is temporarily stopped.

This is my configuration:

```

@type sql
adapter postgresql
host localhost
port 5432
database fluentd
username fluentd
password supersecretpasswd

table access_logs
column_mapping '@timestamp:timestamp,action,api_version,host,method,path,route,controller,duration,status,ip,source,retriever_cached:cached,token_id,parameters:params,request_id'

@type tail
@id input_tail

@type json

path /path/to/input.json
pos_file /path/to/input.json.pos
tag td.foo.bla

```

Packages versions:

```
$ fluentd --version
fluent-package 5.0.1 fluentd 1.16.2 (d5685ada81ac89a35a79965f1e94bbe5952a5d3a)
$ fluent-gem list|grep sql
fluent-plugin-sql (2.3.0)
$ cat /etc/os-release
PRETTY_NAME="Ubuntu 22.04.3 LTS"
```