[Workers] Add changelog for Observability query language

[nevikashah]

Summary

• Adds a changelog entry for the new Workers Observability query language feature
• The query language lets users write structured queries in the search bar to filter logs and traces, with support for operators, functions, and boolean logic
• Search bar syncs bidirectionally with the Query Builder sidebar and provides autocomplete suggestions

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/assets/images/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing

[elithrar]

/bonk run a full review, use the changelog skill, and suggest changes in-line

[ask-bonk]

Changelog Review

Overall this is a solid changelog entry — well-structured, good use of the bullet list for feature breakdown, and consistent with the style of prior Workers Observability changelogs. A few suggestions below.

Summary by severity:

• MEDIUM (1): Image alt text does not match the screenshot content
• LOW (2): Minor style phrasing improvements

[ask-bonk]

Review posted with 2 inline suggestions on PR #28567.

Review Summary

What looks good:

• Frontmatter is correct — all required fields present, valid product, date matches filename
• File path follows the src/content/changelog/{product}/{date}-{slug}.mdx convention
• No MDX syntax issues (no unescaped {}/<>, no missing imports)
• Internal link /workers/observability/ exists and has a trailing slash
• Dashboard deeplink is properly formatted
• Writing style is consistent with recent Workers changelogs (e.g., the 2026-02-06 observability UI refresh entry)
• Bullet list format matches prior entries well
• No code blocks needed (UI feature, not API/config change) — appropriate

Suggestions posted (2):

Severity	Line	Issue
MEDIUM	11	Image alt text says "help modal" but the screenshot shows the search bar with autocomplete suggestions and Query Builder sidebar — alt text should describe the actual image
LOW	25	"Head to" should be "Go to" per style guide; "today" is unnecessary filler

github run

[github-actions]

Preview URL: https://6a723d08.preview.developers.cloudflare.com
Preview Branch URL: https://changelog-workers-observability-query-language.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/changelog/2026-02-24-observability-query-language/	https://changelog-workers-observability-query-language.preview.developers.cloudflare.com/changelog/2026-02-24-observability-query-language/

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