chore: Add required size_check for GH Actions

[JPeer264]

It seems that the size limit was not enforced and a PR could be merged without the job being green, see:

[github-actions]

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	9,520	-	9,475	+0%
GET With Sentry	1,428	15%	1,349	+6%
GET With Sentry (error only)	6,241	66%	6,020	+4%
POST Baseline	1,215	-	1,189	+2%
POST With Sentry	531	44%	513	+4%
POST With Sentry (error only)	1,072	88%	1,072	-
MYSQL Baseline	3,340	-	3,320	+1%
MYSQL With Sentry	461	14%	431	+7%
MYSQL With Sentry (error only)	2,708	81%	2,688	+1%

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