focus: DatabaseManager.query @24-26
edges: 23 blank above, 27-28 blank below
next: sct callers query (its call sites)
basic.py (1-75)
- DatabaseManager @8 # Manages database connections and queries.
  - __init__ (self, connection_string: str) @11
  - connect (self) @15 # Establish database connection.
  - disconnect (self) @19 # Close database connection.
  - query (self, sql: str) -> list @24 # Execute a SQL query.
     24 |     def query(self, sql: str) -> list:
     25 |         """Execute a SQL query."""
     26 |         return []
