#673 Fix dict_row cursor access bugs in workflows and secrets APIs

Fixed two instances of tuple index access on dict_row cursor results: 1. api/blueprints/v1/workflows.py (lines 600, 672): Added row_factory=dict_row to cursor creation 2. engine/tools/secrets.py (lines 134-136): Changed tuple indices to dict keys Root cause: psycopg3 returns tuples by default. Code assumed dict access. All 7 originally failing tests now pass.