Restored legacy deletion settings to existing imports

[girishpanchal30]

Summary

Restored the legacy setting - auto-delete days for imported posts and delete attached media. The setting is only rendered for imports that already have it stored, so it won't create it for the rest.

Screenshots

Test instructions

• Create a new import and set up the auto-delete days and delete attached media settings from the older version.
• Verify that the settings are displayed in the import edit page and that they are saved correctly when updated.
• Also verify that the settings are not displayed for new imports that don't have them stored.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR

Closes https://github.com/Codeinwp/feedzy-rss-feeds-pro/issues/1010

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🌍 i18n String Review Report

📊 Summary

Category	Count
➕ Added	2
➖ Removed	0
🔄 Changed	0
Total	2

➕ Added Strings (2) - Click to expand

String	Location	Words	Suggested Match
Delete the posts created for this import after ...	includes/views/import-meta...	12	Delete the posts created from all feeds, after a number of days
Helpful if you want to remove stale or old item...	includes/views/import-meta...	22	Helpful if you want to remove stale or old items automatically. If you choose 0, it will be considered the individual import setting.
Total		34

[Copilot]

Pull request overview

Restores legacy per-import post and media deletion settings only for imports that previously stored them.

Changes:

• Restores legacy deletion controls and persistence behavior.
• Adds PHPUnit coverage for visibility and saving.
• Updates test bootstrap for SDK helpers.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
includes/admin/feedzy-rss-feeds-import.php	Loads and saves legacy deletion metadata.
includes/views/import-metabox-edit.php	Renders legacy deletion controls conditionally.
tests/test-import-legacy-settings.php	Tests legacy setting visibility and persistence.
tests/bootstrap.php	Reloads the SDK loader during test bootstrap.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

Suppressed comments (1)

includes/admin/feedzy-rss-feeds-import.php:765

• Clearing the new number input submits an empty string (the field is not required). This branch then deletes import_feed_delete_days, so the legacy control disappears on the next edit and the import can fall back to the global deletion period instead of remaining disabled. Normalize an empty submitted value to the documented 0 state (or reject blank input) and add a regression test for this save path.

					if ( ( 'default_thumbnail_id' === $key || 'import_feed_delete_days' === $key ) && '0' === $value ) { // Mark the feed as having no default fallback image or auto-delete days (including the global fallback).