schemas, pydantic, and validation — making the model return real data

Final drill. Write safe_extract(raw) that parses a JSON string the model returned and validates a Ticket shape:

• email must be a non-empty str
• severity must be an int between 1 and 5 inclusive

If any check fails, return the dict {"ok": False, "error": "<reason>"} where <reason> is one of "bad json", "missing email", "bad severity". On success, return {"ok": True, "data": <parsed dict>}.

Then the script will run it on three inputs and print the result of each. Expected output:

ok=True email=maya@promptdojo.dev
ok=False error=missing email
ok=False error=bad severity