add sort by advertised_start_time

[benrobey]

Step 2: Order Races by Advertised Start Time

Results are now always ordered by advertised_start_time ascending (earliest first) by default. You can reverse the order with sort_direction.

Field: filter.sort_direction (enum, optional)

Values:

• SORT_DIRECTION_UNSPECIFIED (or omitted) → ascending (earliest to latest)
• SORT_DIRECTION_ASC → ascending
• SORT_DIRECTION_DESC → descending (latest to earliest)

Example – Default ordering (ascending)

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

No sort_direction provided → ascending order.

Example – Explicit descending order

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

Returns the most recently scheduled (or already started) races first.

Combine ordering with visibility:

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