chore: Add shared validate-pr composite action

[stephanie-anderson]

Add the PR validation workflow using the shared composite action from
getsentry/github-workflows#153.

Validates non-maintainer PRs against contribution guidelines and enforces
draft status on all new PRs.

#skip-changelog

Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

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[github-actions]

size-limit report 📦

⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Path	Size	% Change	Change
@sentry/browser	25.69 kB	-	-
@sentry/browser - with treeshaking flags	24.17 kB	-	-
@sentry/browser (incl. Tracing)	42.17 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	46.79 kB	-	-
@sentry/browser (incl. Tracing, Replay)	80.98 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	70.6 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	85.7 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	97.97 kB	-	-
@sentry/browser (incl. Feedback)	42.48 kB	-	-
@sentry/browser (incl. sendFeedback)	30.35 kB	-	-
@sentry/browser (incl. FeedbackAsync)	35.4 kB	-	-
@sentry/browser (incl. Metrics)	26.96 kB	-	-
@sentry/browser (incl. Logs)	27.1 kB	-	-
@sentry/browser (incl. Metrics & Logs)	27.78 kB	-	-
@sentry/react	27.45 kB	-	-
@sentry/react (incl. Tracing)	44.52 kB	-	-
@sentry/vue	30.13 kB	-	-
@sentry/vue (incl. Tracing)	44.08 kB	-	-
@sentry/svelte	25.7 kB	-	-
CDN Bundle	28.39 kB	-	-
CDN Bundle (incl. Tracing)	43.2 kB	-	-
CDN Bundle (incl. Logs, Metrics)	29.76 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics)	44.25 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics)	68.56 kB	-	-
CDN Bundle (incl. Tracing, Replay)	80.08 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	81.16 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	85.62 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	86.67 kB	-	-
CDN Bundle - uncompressed	82.93 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	128.07 kB	-	-
CDN Bundle (incl. Logs, Metrics) - uncompressed	87.07 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	131.48 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	210.06 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	244.95 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	248.34 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	257.86 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	261.25 kB	-	-
@sentry/nextjs (client)	46.93 kB	-	-
@sentry/sveltekit (client)	42.67 kB	-	-
@sentry/node-core	56.51 kB	+0.03%	+12 B 🔺
@sentry/node	173.6 kB	+0.01%	+12 B 🔺
@sentry/node - without tracing	96.54 kB	+0.01%	+5 B 🔺
@sentry/aws-serverless	113.54 kB	+0.01%	+8 B 🔺

View base workflow run

[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	8,778	-	9,471	-7%
GET With Sentry	1,661	19%	1,653	+0%
GET With Sentry (error only)	6,090	69%	5,960	+2%
POST Baseline	1,202	-	1,198	+0%
POST With Sentry	592	49%	583	+2%
POST With Sentry (error only)	1,060	88%	1,047	+1%
MYSQL Baseline	3,271	-	3,251	+1%
MYSQL With Sentry	472	14%	468	+1%
MYSQL With Sentry (error only)	2,679	82%	2,633	+2%

View base workflow run