Add PostgreSQL DB relation #236

Job	Run time
integration-tests / Plan	5s
integration-tests / Plan	5s
integration-tests / Build charm (temporal-worker-k8s)	11m 15s
integration-tests / Build charm (temporal-worker-k8s)	11m 15s
integration-tests / Build rock (temporal-worker)	4m 32s
integration-tests / Build rock (temporal-worker)	4m 32s
integration-tests / Plan Image Scanning	3s
integration-tests / Plan Image Scanning	3s
integration-tests / Integration tests / Integration tests (test_charm.py)	9m 55s
integration-tests / Integration tests / Integration tests (test_charm.py)	9m 55s
integration-tests / Integration tests / Integration tests (test_scaling.py)	12m 10s
integration-tests / Integration tests / Integration tests (test_scaling.py)	12m 10s
integration-tests / Integration tests / Integration tests (test_vault.py)	17m 43s
integration-tests / Integration tests / Integration tests (test_vault.py)	14m 29s
integration-tests / Integration tests / Integration tests (test_postgres_db.py)	11m 43s
integration-tests / Integration tests / Integration tests (test_postgres_db.py)	11m 43s
integration-tests / Scan Image (ghcr.io-canonical-temporal-worker-4483bc56b6a80add764a1178f8ac52d3b0352385-_1.0_amd64.tar)	28s
integration-tests / Scan Image (ghcr.io-canonical-temporal-worker-4483bc56b6a80add764a1178f8ac52d3b0352385-_1.0_amd64.tar)	28s
integration-tests / Required Integration Test Status Checks	1s
integration-tests / Required Integration Test Status Checks	1s
	2h 12m 36s

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