[FLINK-39633][postgres] Fix NPE in incremental snapshot backfill when WAL carries records for other captured tables #2455

Job	Run time
License Check	4m 53s
Pipeline Connectors Unit Tests 2.x / test (11, 2.2.0, doris, elasticsearch, fluss, iceberg, kafka, maxcompute, mysql-pipeline, oceanba...	1h 2m 44s
Pipeline Unit Tests / test (11, generic, doris, elasticsearch, fluss, hudi, iceberg, kafka, maxcompute, mysql-pipeline,...	1h 3m 29s
Common Unit Tests 2.x / test (11, 2.2.0, core)	13m 42s
Source E2E Tests / test (11, 1.20.3, source_e2e)	27m 49s
Source Unit Tests / test (11, generic, oracle, sqlserver)	48m 5s
Source Unit Tests / test (11, generic, postgres-source, oceanbase-source, tidb, vitess)	26m 36s
Source Unit Tests / test (11, generic, mysql-source)	46m 24s
Source Unit Tests / test (11, generic, db2, mongodb)	43m 24s
Common Unit Tests / test (11, generic, core)	12m 55s
Source Unit Tests 2.x / test (11, 2.2.0, db2, mongodb)	35m 31s
Pipeline E2E Tests 2.x (4-Parallelism) / test (11, 2.2.0, pipeline_e2e)	59m 10s
Pipeline E2E Tests 2.x (1-Parallelism) / test (11, 2.2.0, pipeline_e2e)	1h 4m 30s
Source Unit Tests 2.x / test (11, 2.2.0, mysql-source)	42m 33s
Source Unit Tests 2.x / test (11, 2.2.0, postgres-source, oceanbase-source, tidb, vitess)	47m 41s
Pipeline E2E Tests (1-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 20m 33s
Pipeline E2E Tests (4-Parallelism) / test (11, 1.20.3, pipeline_e2e)	1h 21m 1s
Source Unit Tests 2.x / test (11, 2.2.0, oracle, sqlserver)	4m 28s
	12h 45m 28s

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