Add csv export doc

[ebenezerdon]

What does this PR do?

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Summary by CodeRabbit

• New Features

  • Added documentation navigation entries for CSV exports and Database operators.

• Documentation

  • Published a comprehensive CSV exports guide covering configuration, usage examples, column/delimiter/header options, relationships, timestamps, permissions, background processing, console export steps, and best practices; added related visuals.

• Bug Fixes

  • Adjusted subtitle visibility so the CSV exports page displays the intended subtitle behavior.

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Walkthrough

This pull request adds two new navigation items under Journeys in the databases docs: "CSV exports" (href: /docs/products/databases/csv-exports, marked new until 28 Feb 2026) and "Database operators" (href: /docs/products/databases/operators, marked new until 31 Dec 2025). The hideSubtitleRoutes array in src/routes/docs/products/databases/+layout.svelte is extended to include csv-exports. A new documentation page is added at src/routes/docs/products/databases/csv-exports/+page.markdoc describing the CSV export feature, configuration, usage examples, and related guidance. Two image assets for CSV export were added to the optimize cache mapping.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Add csv export doc' directly and accurately describes the main change in the PR: adding a new CSV export documentation page.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch csv-export-doc

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Actionable comments posted: 2

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5900023 and 4865f15.

📒 Files selected for processing (2)

• src/routes/docs/products/databases/+layout.svelte (2 hunks)
• src/routes/docs/products/databases/csv-exports/+page.markdoc (1 hunks)

🔇 Additional comments (4)

src/routes/docs/products/databases/+layout.svelte (2)

114-118: LGTM! CSV exports navigation properly integrated.

The navigation item correctly links to the new documentation page being added in this PR, with appropriate "new" badge timing.

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149-149: LGTM! Correctly prevents subtitle on CSV exports page.

Adding 'csv-exports' to hideSubtitleRoutes is appropriate, as CSV exports (like imports and backups) is a standalone feature that doesn't need the "New API" alert comparing it to the legacy Collections API.

src/routes/docs/products/databases/csv-exports/+page.markdoc (2)

1-140: Well-structured and comprehensive documentation.

The documentation is clear, well-organized, and follows best practices with helpful examples, use cases, and cross-references to related documentation. The content flows logically from configuration options through implementation details to best practices.

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17-140: All internal documentation links have been verified and are valid. Every referenced page exists at the correct location, and the anchor reference to #query-operators on the queries page is properly declared.