Update metrics logging

This commit updates the metrics.lua file in the src/common/core/metrics directory. The changes include:
- Replacing the 'date' field with the current system time using os.time()
- Updating the 'code' field to 'status' to match the ngx.status value

src/common/core/metrics/metrics.lua

@@ -50,12 +50,12 @@ function metrics:log()
 			end
 		end
 		local request = {
-			date = self.ctx.bw.local_time,
+			date = os.time(),
 			ip = self.ctx.bw.remote_addr,
 			country = country,
 			method = self.ctx.bw.request_method,
 			url = self.ctx.bw.request_uri,
-			code = ngx.status,
+			status = ngx.status,
 			["user-agent"] = self.ctx.bw.http_user_agent or "",
 			reason = reason,
 			data = data,