Add warning for Service Worker deprecation

[harshil1712]

Summary

Updates a warning for Service Worker examples.

Documentation checklist

• The documentation style guide has been adhered to.

[hyperlint-ai]

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PR Change Summary

Updated documentation to include warnings regarding the deprecation of Service Workers and recommended migration to Module Workers.

• Added caution notes about Service Workers being deprecated in multiple documentation files.
• Recommended using Module Workers instead of Service Workers for new features.
• Updated examples to reflect the changes in Service Worker usage.

Modified Files

• src/content/docs/learning-paths/mtls/mtls-workers/index.mdx
• src/content/docs/workers/configuration/sites/start-from-existing.mdx
• src/content/docs/workers/examples/cache-using-fetch.mdx
• src/content/docs/workers/observability/errors.mdx
• src/content/docs/workers/observability/logs/workers-logs.mdx
• src/content/docs/workers/reference/migrate-to-module-workers.mdx
• src/content/docs/workers/runtime-apis/fetch.mdx
• src/content/docs/workers/runtime-apis/streams/index.mdx
• src/content/docs/workers/wrangler/migration/v1-to-v2/wrangler-legacy/configuration.mdx

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[github-actions]

Preview URL: https://75d3c337.preview.developers.cloudflare.com
Preview Branch URL: https://service-worker-callout.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/learning-paths/mtls/mtls-workers/	https://service-worker-callout.preview.developers.cloudflare.com/learning-paths/mtls/mtls-workers/
https://developers.cloudflare.com/workers/observability/errors/	https://service-worker-callout.preview.developers.cloudflare.com/workers/observability/errors/
https://developers.cloudflare.com/workers/runtime-apis/streams/	https://service-worker-callout.preview.developers.cloudflare.com/workers/runtime-apis/streams/
https://developers.cloudflare.com/workers/configuration/sites/start-from-existing/	https://service-worker-callout.preview.developers.cloudflare.com/workers/configuration/sites/start-from-existing/
https://developers.cloudflare.com/workers/examples/cache-using-fetch/	https://service-worker-callout.preview.developers.cloudflare.com/workers/examples/cache-using-fetch/
https://developers.cloudflare.com/workers/observability/logs/workers-logs/	https://service-worker-callout.preview.developers.cloudflare.com/workers/observability/logs/workers-logs/
https://developers.cloudflare.com/workers/reference/migrate-to-module-workers/	https://service-worker-callout.preview.developers.cloudflare.com/workers/reference/migrate-to-module-workers/
https://developers.cloudflare.com/workers/runtime-apis/fetch/	https://service-worker-callout.preview.developers.cloudflare.com/workers/runtime-apis/fetch/
https://developers.cloudflare.com/workers/wrangler/migration/v1-to-v2/wrangler-legacy/configuration/	https://service-worker-callout.preview.developers.cloudflare.com/workers/wrangler/migration/v1-to-v2/wrangler-legacy/configuration/

[kristianfreeman]

Warning might be a bit redundant here but no biggie: https://service-worker-callout.preview.developers.cloudflare.com/workers/reference/migrate-to-module-workers/

Is it worth breaking this out into a re-usable template, in case we have to update this later? I'm good w/ it merging as-is but worth asking @kodster28 and @KianNH maybe

[irvinebroque]

Why do we still have service workers examples in our docs at all?

[harshil1712]

@irvinebroque, we have deprecated Service Workers, but we still support them. We might have users still using them, and so we need examples to support them. We should remove the examples once we completely stop the supporting Service Workers.