Update README with AI-powered data validation section #3336

Job	Run time
test (latest_official, databricks_catalog) / test	19m 23s
test (1.3.0, postgres) / test	23m 3s
test (latest_official, athena) / test	36m 35s
test (latest_official, databricks) / test	12m 36s
test (latest_official, bigquery) / test	20m 11s
test (latest_official, postgres) / test	12m 42s
test (latest_official, redshift) / test	2h 5m 4s
test (latest_official, snowflake) / test	14m 57s
test (latest_official, trino) / test	20m 52s
test (latest_pre, postgres) / test	12m 47s
Notify Slack	0s
	4h 58m 10s

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