### What problem does this PR solve?
issue:
[#10296](https://github.com/infiniflow/ragflow/issues/10296)
change:
- ExeSQL: support connecting to Trino.
- Validation: password can be empty only when db_type === "trino";
all other database types keep the existing requirement (non-empty).
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
4e6b84bb41