feat(core)!: Remove sentry.sdk_meta.gen_ai.input.messages.original_length attribute

[nicohrubec]

Removes the internal sentry.sdk_meta.gen_ai.input.messages.original_length span attribute across @sentry/core and @sentry/server-utils. Truncation itself including the enableTruncation flag will be removed in a follow up to keep this easier to review.

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	27.77 kB	-0.06%	-16 B 🔽
@sentry/browser - with treeshaking flags	26.21 kB	-0.06%	-14 B 🔽
@sentry/browser (incl. Tracing)	46.29 kB	-0.04%	-16 B 🔽
@sentry/browser (incl. Tracing + Span Streaming)	48.08 kB	+0.01%	+4 B 🔺
@sentry/browser (incl. Tracing, Profiling)	51.12 kB	+0.01%	+5 B 🔺
@sentry/browser (incl. Tracing, Replay)	85.57 kB	-0.02%	-11 B 🔽
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	75.21 kB	-0.02%	-11 B 🔽
@sentry/browser (incl. Tracing, Replay with Canvas)	90.28 kB	-0.02%	-12 B 🔽
@sentry/browser (incl. Tracing, Replay, Feedback)	102.93 kB	-0.04%	-32 B 🔽
@sentry/browser (incl. Feedback)	44.96 kB	+0.01%	+3 B 🔺
@sentry/browser (incl. sendFeedback)	32.57 kB	-0.05%	-14 B 🔽
@sentry/browser (incl. FeedbackAsync)	37.63 kB	-0.01%	-2 B 🔽
@sentry/browser (incl. Metrics)	28.86 kB	-0.06%	-17 B 🔽
@sentry/browser (incl. Logs)	29.08 kB	-0.09%	-24 B 🔽
@sentry/browser (incl. Metrics & Logs)	29.78 kB	-0.06%	-16 B 🔽
@sentry/react	29.56 kB	-0.09%	-24 B 🔽
@sentry/react (incl. Tracing)	48.59 kB	-0.02%	-5 B 🔽
@sentry/vue	33.2 kB	-0.06%	-18 B 🔽
@sentry/vue (incl. Tracing)	48.25 kB	-0.05%	-20 B 🔽
@sentry/svelte	27.79 kB	-0.07%	-19 B 🔽
CDN Bundle	30.1 kB	-0.02%	-5 B 🔽
CDN Bundle (incl. Tracing)	48.16 kB	-0.02%	-7 B 🔽
CDN Bundle (incl. Logs, Metrics)	31.69 kB	-0.02%	-4 B 🔽
CDN Bundle (incl. Tracing, Logs, Metrics)	49.48 kB	-0.02%	-5 B 🔽
CDN Bundle (incl. Replay, Logs, Metrics)	70.95 kB	-0.01%	-1 B 🔽
CDN Bundle (incl. Tracing, Replay)	85.72 kB	-0.01%	-6 B 🔽
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	87.02 kB	-0.01%	-1 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback)	91.5 kB	-0.01%	-1 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	92.78 kB	-	-
CDN Bundle - uncompressed	89.72 kB	-0.04%	-33 B 🔽
CDN Bundle (incl. Tracing) - uncompressed	144.82 kB	-0.03%	-33 B 🔽
CDN Bundle (incl. Logs, Metrics) - uncompressed	94.43 kB	-0.04%	-33 B 🔽
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	148.8 kB	-0.03%	-33 B 🔽
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	219.19 kB	-0.02%	-33 B 🔽
CDN Bundle (incl. Tracing, Replay) - uncompressed	264.06 kB	-0.02%	-33 B 🔽
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	268.02 kB	-0.02%	-33 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	277.76 kB	-0.02%	-33 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	281.71 kB	-0.02%	-33 B 🔽
@sentry/nextjs (client)	51.1 kB	-0.06%	-26 B 🔽
@sentry/sveltekit (client)	46.71 kB	-0.08%	-33 B 🔽
@sentry/core/server	79.98 kB	-0.26%	-205 B 🔽
@sentry/core/browser	51.98 kB	-0.03%	-14 B 🔽
@sentry/node	124.09 kB	-0.44%	-543 B 🔽
@sentry/node (incl. diagnostics channel injection)	149.54 kB	-0.34%	-508 B 🔽
@sentry/node/import (ESM hook with diagnostics-channel injection)	70.03 kB	-	-
@sentry/node - without tracing	74.43 kB	-0.45%	-330 B 🔽
@sentry/aws-serverless	83.92 kB	-0.4%	-332 B 🔽
@sentry/cloudflare (withSentry) - minified	196.43 kB	-0.11%	-208 B 🔽
@sentry/cloudflare (withSentry)	483.47 kB	-0.09%	-399 B 🔽

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