[Bug] [Module Name] Bug title oracle cdc 方式， 只建了表，没有收集已有数据，是我配置的不对吗

### Search before asking

- [x] I had searched in the [issues](https://github.com/apache/seatunnel/issues?q=is%3Aissue+label%3A%22bug%22) and found no similar issues.

### What happened

source {
Oracle-CDC {
username = "xxx"
password = "xxxx"
database-names=["ORCL"]
schema-names=["xx"]
table-names = [
"ORCL.xxx.xq"
]
base-url = "jdbc:oracle:thin:@2.2.2.2:1521:ORCL"
source.reader.close.timeout=120000

plugin_output = "oracle_cdc_source"
}
}

### SeaTunnel Version

2.3.11

### SeaTunnel Config

```conf
env {
parallelism = 1
job.mode = "STREAMING"
checkpoint.interval = 5000
}

source {
Oracle-CDC {
username = "xxx"
password = "xxxx"
database-names=["ORCL"]
schema-names=["xx"]
table-names = [
"ORCL.xxx.xq"
]
base-url = "jdbc:oracle:thin:@2.2.2.2:1521:ORCL"
source.reader.close.timeout=120000

plugin_output = "oracle_cdc_source"
}
}

transform {
TableFilter{
plugin_input = "oracle_cdc_source"
plugin_output = "table_filter"
database_pattern = "xxxx"
table_pattern = "xhp_dwml"
pattern_mode = "EXCLUDE"
}

FilterRowKind {
plugin_input = "table_filter"
plugin_output = "filter_row_kind"
exclude_kinds = ["UPDATE_BEFORE"]
}

RowKindExtractor {
plugin_input = "filter_row_kind"
custom_field_name = "row_kind"
transform_type = FULL
plugin_output = "with_row_kind"
}

# 添加dt字段 - 使用当前日期
# 注意: dt必须是DATE类型, doris中自动分区字段必须是DATE类型
Sql {
plugin_input = "with_row_kind"
query = """
SELECT
*,
CURRENT_DATE as dt,
CURRENT_TIMESTAMP as ct
FROM with_row_kind
"""
plugin_output = "trans_result"
}
}

sink {
Doris {
plugin_input = "trans_result"
fenodes = "1.7.1.1:8030"
username = "root"
password = "111*o@111"
database = "mysql_${database_name}"
table = "ods_${table_name}"
save_mode_create_template = """
CREATE TABLE IF NOT EXISTS `${database}`.`${table_name}` (
${rowtype_primary_key},
dt DATE NOT NULL COMMENT 'dt',
ct DATETIME NOT NULL COMMENT 'ct',
${rowtype_fields}
) ENGINE=OLAP
DUPLICATE KEY (${rowtype_primary_key}, dt)
COMMENT '${comment}'
AUTO PARTITION BY RANGE (date_trunc(`dt`, 'year')) ()
DISTRIBUTED BY HASH (${rowtype_primary_key}) BUCKETS 5
PROPERTIES (
"replication_num" = "1",
"storage_format" = "V2",
"light_schema_change" = "true",
"disable_auto_compaction" = "false"
)
"""
sink.enable-2pc = "true"
sink.enable-delete = "false"
doris.config {
format = "json"
read_json_by_line = "true"
}
}
}
```

### Running Command

```shell
./bin/seatunnel.sh --config xxx.conf --async -n job1
```

### Error Exception

```log
无
```

### Zeta or Flink or Spark Version

_No response_

### Java or Scala Version

_No response_

### Screenshots

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)

Start by reproducing the provided Oracle-CDC configuration on SeaTunnel 2.3.11 and inspect the source and sink behavior around startup. Confirm whether existing Oracle rows are captured in addition to table creation; the issue provides no failing test, source file, or error log to narrow the investigation.

Written by the indexing model from the issue text.