Expose per-model weekly usage in statusline hook payload

Feature Request

The rate_limits object in the statusline hook JSON input currently only exposes two fields:

{
  "rate_limits": {
    "five_hour": { "used_percentage": 66, "resets_at": 1776999600 },
    "seven_day": { "used_percentage": 21, "resets_at": 1777212000 }
  }
}

The Claude.ai usage page shows per-model weekly meters (e.g. Sonnet-only, Opus-only). Claude Max subscribers have separate weekly limits per model, but this breakdown isn't forwarded to the statusline hook.

Requested Change

Expose per-model weekly usage in the hook payload, e.g.:

{
  "rate_limits": {
    "five_hour": { "used_percentage": 66, "resets_at": 1776999600 },
    "seven_day": { "used_percentage": 21, "resets_at": 1777212000 },
    "seven_day_sonnet": { "used_percentage": 15, "resets_at": 1777212000 },
    "seven_day_opus": { "used_percentage": 5, "resets_at": 1777212000 }
  }
}

Use Case

Custom statusline scripts can then display model-specific weekly burn rates alongside the existing aggregate limit, e.g.:

| 5hr (22:00): 63%, wk: 20% (son: 15%) (resets Sun 09:00) |