fix: add postgres columns validations and connector test

[hoangnh93]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 4269576260

• 148 of 389 (38.05%) changed or added relevant lines in 2 files are covered.
• 27 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.08%) to 71.976%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
dozer-ingestion/src/connectors/postgres/replication_slot_helper.rs	146	153	95.42%
dozer-ingestion/src/connectors/postgres/connection/validator.rs	2	236	0.85%

Files with Coverage Reduction	New Missed Lines	%
dozer-api/src/grpc/typed/tests/service.rs	2	97.79%
dozer-ingestion/src/errors.rs	11	2.78%
dozer-ingestion/src/connectors/postgres/connection/validator.rs	14	9.15%

Totals
Change from base Build 4268765635:	0.08%
Covered Lines:	27546
Relevant Lines:	38271

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💛 - Coveralls