Move middleware context handler logic to service (#29605)

* middleware: Move context handler to own service

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Emil Tullsted <sakjur@users.noreply.github.com>
Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

pkg/setting/setting_quota.go

@@ -86,4 +86,6 @@ func (cfg *Cfg) readQuotaSettings() {
 		ApiKey:     quota.Key("global_api_key").MustInt64(-1),
 		Session:    quota.Key("global_session").MustInt64(-1),
 	}
+
+	cfg.Quota = Quota
 }