respect dataset adapter

[xzrderek]

Note

Medium Risk
Changes how JSONL datasets are loaded when EP_JSONL_PATH is set by optionally routing rows through dataset_adapter, which could alter row construction and labeling for existing env-driven workflows.

Overview
When EP_JSONL_PATH is used to auto-create a DynamicDataLoader, JSONL lines are now loaded as raw dicts and passed through the configured dataset_adapter (instead of always constructing EvaluationRow(**dict)).

evaluation_test now forwards its dataset_adapter into parse_ep_dataloaders, preserving adapter-specific fields (e.g., custom labels) for env-driven JSONL runs while keeping legacy behavior when no adapter is provided.

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