Use this first when a user needs a locksmith. Returns a ranked list of
human-vetted providers (featured first) with id, name, city, services,
rating, verified/featured flags, phone, and a profile URL.

Args:
    location: A 5-digit US ZIP code (preferred) or a US city name.
    service:  Optional job type, e.g. "lockout", "automotive", "residential",
              "commercial", "rekey", "install", "safe".
    urgency:  Optional, e.g. "emergency", "today", "scheduled".
    budget:   Optional free-text budget hint.
    limit:    Max results to return (1-20, default 5).

Note: price and ETA are NOT pre-listed — they are confirmed by the locksmith
after you call request_quote. Do not invent prices or ETAs.