Function invalidate_function_paths 

pub fn invalidate_function_paths(
    conn: &mut Connection,
    function_id: i64,
) -> Result<()>

Invalidate all cached paths for a function

Arguments

• conn - Database connection
• function_id - ID of the function to invalidate paths for

Returns

Ok(()) on success, error on database failure

Algorithm

1. Begin transaction
2. Delete path_elements first (FK dependency: elements reference paths)
3. Delete paths
4. Commit transaction

Idempotent

Returns Ok(()) even if no paths exist for the function.