[DT-3774] Fix missing dac_approval column in DacDAO.findAll()

[kevinmarete]

Addresses

https://broadworkbench.atlassian.net/browse/DT-3774

Summary

GET /api/dac never selected dac_approval for the datasets embedded in each DAC, so dacApproval was always null on that response — causing the Manage DAC table's dataset counts to disagree with the DAC profile page (which uses a different endpoint that does select this column). Added the column to the query and mapped it in DacReducer, added a Dac.getDatasets() accessor, and added a DAO test covering approved vs. pending datasets.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud