Visibility and Go updates

[benrobey]

Visibility Filtering + Go version and dependency upgrades

Add optional visible_only filter to ListRaces

Behavior:

• Omit the field or set it to false => you get all races (same as before).
• Set it to true => you only get races where visible = true.

Upgraded out of date go 1.16 -> 1.22 for needed updated language features

Example 1: Get All Races (no filtering)

curl -s -X POST http://localhost:8000/v1/list-races \
  -H "Content-Type: application/json" \
  -d '{}'

Shows every race (visible + non‑visible). This matches legacy behavior.

Example 2: Only Visible Races

curl -s -X POST http://localhost:8000/v1/list-races \
  -H "Content-Type: application/json" \
  -d '{
        "filter": {
          "visible_only": true
        }
      }'

Narrows the list to races currently marked visible.

Example 3: Combine With Meeting IDs

curl -s -X POST http://localhost:8000/v1/list-races \
  -H "Content-Type: application/json" \
  -d '{
        "filter": {
          "meeting_ids": [1,2],
          "visible_only": true
        }
      }'

Returns only visible races whose meeting_id is 1 or 2.

Sample Truncated Response

{
  "races": [
    {
      "id": 42,
      "meeting_id": 1,
      "name": "Morning Dash",
      "number": 3,
      "visible": true,
      "advertised_start_time": "2025-08-17T09:15:00Z"
    }
  ]
}