PLT-7810 Track if an APIv3 endpoint was used in the last day (#7744)

* Track if an APIv3 endpoint was used in the last day

* Make it atomic

api/context.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+	"sync/atomic"
 	"time"
 
 	l4g "github.com/alecthomas/log4go"
@@ -216,6 +217,10 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		c.CheckTeamId()
 	}
 
+	if h.isApi {
+		atomic.StoreInt32(model.UsedApiV3, 1)
+	}
+
 	if c.Err == nil {
 		h.handleFunc(c, w, r)
 	}