[API] fix validate and evaluation api config, set_trial_config

[hongsw]

Auto-RAG/autorag-frontend#3

/projects/<string:project_id>/trials/<string:trial_id>/validate
/projects/<string:project_id>/trials/<string:trial_id>/evaluate

Issue
Managing nested data with CSVs is inefficient, and frequent dumps are cumbersome.

Solution
Switch to SQLite with asynchronous execution managed by Celery for safe task handling.

Plan
Test project creation, trials (1, 2, 3), validation, and execution in the new setup.

[hongsw]

draft

[vkehfdl1]

close at #1016