[FIX] N+1 API Call: Missing bulk archive capability

[n24q02m]

The archiveTask function was modified to accept an array of task IDs, renaming it to archiveTasks. The executeArchive loop was refactored to chunk tasks into batches of 50 (defined by ARCHIVE_BATCH_SIZE) and process them in bulk. This reduces the number of API calls significantly. Tests were updated to verify the new batching behavior.

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PR created automatically by Jules for task 4016319747220684838 started by @n24q02m

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

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