Enhanced CSV export

[girishpanchal30]

Fixed #2924 (comment)

Summary

Improved the CSV export functionality by batching the submissions to reduce memory usage and prevent timeouts.

Checklist before the final review

• Included E2E or unit tests for the changes in this PR.
• Visual elements are not affected by independent changes.
• It is at least compatible with the minimum WordPress version.
• It loads additional script in frontend only if it is required.
• Does not impact the Core Web Vitals.
• In case of deprecation, old blocks are safely migrated.
• It is usable in Widgets and FSE.
• Copy/Paste is working if the attributes are modified.
• PR is following the best practices

[pirate-bot]

Bundle Size Diff

Package	Old Size	New Size	Diff
Animations	178.33 KB	178.33 KB	0 B (0.00%)
Blocks	1.65 MB	1.65 MB	0 B (0.00%)
CSS	7.83 KB	7.83 KB	0 B (0.00%)
Dashboard	172.49 KB	172.49 KB	0 B (0.00%)
Onboarding	68.14 KB	68.14 KB	0 B (0.00%)
Export Import	4.73 KB	4.73 KB	0 B (0.00%)
Pro	439.82 KB	439.82 KB	0 B (0.00%)

[pirate-bot]

Plugin build for 5ebc94f is ready 🛎️!

• Download Otter – Page Builder Blocks & Extensions for Gutenberg - Production ~ Development
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• Download Blocks Animation - Production ~ Development
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• Download Blocks Export Import - Production ~ Development

[pirate-bot]

E2E Tests

Playwright Test Status: See serial and parallel matrix jobs

Performance Results

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[Copilot]

Pull request overview

Improves CSV submission exports by reducing peak memory usage through batched processing and output streaming.

Changes:

• Adds two-pass batched CSV generation.
• Streams CSV rows directly to output.
• Tests pagination and late-discovered columns.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
inc/plugins/class-form-records-export.php	Implements batched, streamed CSV export.
tests/test-form-submissions.php	Verifies multi-batch export behavior.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

Comments suppressed due to low confidence (1)

inc/plugins/class-form-records-export.php:258

• WP_Query still defaults cache_results to true, so each distinct batch query stores its returned IDs in the runtime post-queries cache. Since there is one cache entry per batch, memory continues to grow with the total submission count even though the post and metadata entries are deleted, undermining the bounded-memory goal for large exports. Disable query-result caching for these one-shot scans; if that causes get_post_status()/get_the_date() to re-query, pass the returned WP_Post into row construction instead.

				'no_found_rows'          => true,
				'update_post_meta_cache' => false,
				'update_post_term_cache' => false,
				'suppress_filters'       => false,

[pirate-bot]

🎉 This PR is included in version 3.2.2 🎉

The release is available on GitHub release

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