feat(core)!: Always use session from isolation scope

[mydea]

This PR ensures that we always take the session from the isolation scope, never from the current scope.

This has the implication that we need to be sure to pass the isolation scope to _processEvent, as this is where the session may be marked as errored. For this, I updated the internal method _processEvent to take the isolation scope as last argument, as well as streamlining this slightly.

I opted to update the signature of the protected _prepareEvent method too, and make currentScope/isolationScope required there. We already always pass this in now, so it safes a few bytes to avoid the fallback everywhere. This should not really affect users unless they overwrite the _processEvent method, which is internal/private anyhow, so IMHO this should be fine. I added a small note to the migration guide anyhow!

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	22.77 KB	-0.08%	-17 B 🔽
@sentry/browser - with treeshaking flags	21.52 KB	-0.05%	-9 B 🔽
@sentry/browser (incl. Tracing)	35.35 KB	-0.04%	-12 B 🔽
@sentry/browser (incl. Tracing, Replay)	72.56 KB	-0.02%	-12 B 🔽
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	62.95 KB	-0.01%	-6 B 🔽
@sentry/browser (incl. Tracing, Replay with Canvas)	76.95 KB	-0.02%	-12 B 🔽
@sentry/browser (incl. Tracing, Replay, Feedback)	89.32 KB	-0.02%	-15 B 🔽
@sentry/browser (incl. Feedback)	39.53 KB	-0.07%	-25 B 🔽
@sentry/browser (incl. sendFeedback)	27.41 KB	-0.05%	-12 B 🔽
@sentry/browser (incl. FeedbackAsync)	32.17 KB	-0.06%	-17 B 🔽
@sentry/react	25.54 KB	-0.02%	-4 B 🔽
@sentry/react (incl. Tracing)	38.16 KB	-0.02%	-6 B 🔽
@sentry/vue	27.06 KB	-0.01%	-1 B 🔽
@sentry/vue (incl. Tracing)	37.22 KB	-0.01%	-1 B 🔽
@sentry/svelte	22.94 KB	-0.07%	-15 B 🔽
CDN Bundle	24.13 KB	-0.15%	-37 B 🔽
CDN Bundle (incl. Tracing)	35.66 KB	-0.15%	-52 B 🔽
CDN Bundle (incl. Tracing, Replay)	70.7 KB	-0.07%	-45 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback)	75.91 KB	-0.06%	-45 B 🔽
CDN Bundle - uncompressed	70.59 KB	-0.22%	-156 B 🔽
CDN Bundle (incl. Tracing) - uncompressed	106.06 KB	-0.15%	-156 B 🔽
CDN Bundle (incl. Tracing, Replay) - uncompressed	219.99 KB	-0.07%	-156 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	232.86 KB	-0.07%	-156 B 🔽
@sentry/nextjs (client)	38.48 KB	-0.02%	-4 B 🔽
@sentry/sveltekit (client)	35.88 KB	-0.03%	-8 B 🔽
@sentry/node	162.88 KB	-0.02%	-19 B 🔽
@sentry/node - without tracing	98.66 KB	-0.02%	-18 B 🔽
@sentry/aws-serverless	128.5 KB	-0.01%	-13 B 🔽

View base workflow run

[codecov]

❌ 3 Tests Failed:

Tests completed	Failed	Passed	Skipped
693	3	690	294

View the top 3 failed tests by shortest run time

sessions/update-session/test.ts should update session when an error is thrown.

Stack Traces | 0.269s run time

test.ts:7:11 should update session when an error is thrown.

sessions/update-session/test.ts should update session when an exception is captured.

Stack Traces | 0.287s run time

test.ts:24:11 should update session when an exception is captured.

client/sessions.test.ts should report crashed sessions

Stack Traces | 30s run time

sessions.test.ts:16:5 should report crashed sessions

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