Log standardized client, side, route_path attributes.

Make it easier to search & categorize request logs

- `client` is now always the client app id
- Added `side`: "client" for incoming request, "backend" for outgoing
- Also log `route_path` for outgoing requests

policies/aggregation/aggregation.js

@@ -129,11 +129,13 @@ module.exports = (config, { gatewayConfig: { serviceEndpoints } }) => {
       // log and keep metrics for request to endpoint
       const report = ({ statusCode, reqTimerEnd, ...rest }) => {
         jsonLog.info({
-          client: 'PROXY',
+          client: app,
+          side: 'backend',
           http_status: statusCode,
           traceparent_id: outgoingTraceParent.id,
           traceparent_parent_id: outgoingTraceParent.parent_id,
           traceparent_trace_id: outgoingTraceParent.traceId,
+          route_path: req.route && req.route.path,
           ...rest
         })
 

policies/lifecycle-logger/logger.js

@@ -30,6 +30,7 @@ module.exports = () => {
       const statusCode = res.statusCode
 
       const infoProps = {
+        side: 'client',
         short_message: `${req.traceparent.traceId} - ${method} ${url} ${statusCode}`,
         traceparent_trace_id: traceParent.traceId,
         traceparent_id: traceParent.id,