Unix Command Call Counter

Given a list of Unix commands that includes both direct commands (like `cp`, `ls`, `mv`) and alias references (like `$1`, `$4`), count how many times each base command is ultimately called. Alias references point to other commands in the list by their 1-based index, and aliases can chain (e.g., `$4` → `$1` → `cp`). Return a dictionary mapping each base command to its total call count after resolving all aliases.