[workers-observability] query builder docs

[rohinlohe]

Summary

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

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PR Change Summary

Updated the Workers Observability documentation to include a new Query Builder feature for investigating telemetry data.

• Added a new page for the Query Builder to help users write structured queries for telemetry data.
• Introduced an Investigate page that links to the Query Builder.
• Modified existing logs documentation to reflect updates and clarify information.

Modified Files

• src/content/docs/workers/observability/logs/index.mdx
• src/content/docs/workers/observability/logs/workers-logs.mdx

Added Files

• src/content/docs/workers/observability/investigate/index.mdx
• src/content/docs/workers/observability/investigate/query-builder.mdx

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[github-actions]

Preview URL: https://60403d0e.preview.developers.cloudflare.com
Preview Branch URL: https://rohin-qb-dev-docs.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/observability/query-builder/	https://rohin-qb-dev-docs.preview.developers.cloudflare.com/workers/observability/query-builder/
https://developers.cloudflare.com/workers/observability/	https://rohin-qb-dev-docs.preview.developers.cloudflare.com/workers/observability/
https://developers.cloudflare.com/workers/observability/logs/	https://rohin-qb-dev-docs.preview.developers.cloudflare.com/workers/observability/logs/
https://developers.cloudflare.com/workers/observability/logs/workers-logs/	https://rohin-qb-dev-docs.preview.developers.cloudflare.com/workers/observability/logs/workers-logs/
https://developers.cloudflare.com/workers/observability/metrics-and-analytics/	https://rohin-qb-dev-docs.preview.developers.cloudflare.com/workers/observability/metrics-and-analytics/

[rohinlohe]

going to update some of the screenshots

[ToriLindsay]

@rohinlohe Left some suggestions and approved. Feel free to disregard any suggestions that don't make sense with the context. Thanks!

[ToriLindsay]

Do you have other near-term plans for the "Investigate" section? Because if it only contains "Query Builder" right now, maybe that can just go up a level and you can remove "Investigate"? I'm just always trying to think of ways to make things less nested and hidden.