Docs: Clarify that cron event arguments must match when using wp_sche…

[manishdhorepatil-art]

Summary

Improves inline documentation for wp_schedule_event() and wp_next_scheduled() to clarify that the $args parameter is part of the unique identifier for scheduled cron events.

Problem

If developers schedule an event with arguments but later check for existing events without passing the same arguments, WordPress treats them as different events. This can result in duplicate cron entries being created on every page load, potentially causing excessive growth of the cron option and database performance issues.

Solution

This patch enhances the DocBlocks for both functions to:

• Clarify that event arguments must match exactly when checking or unscheduling events
• Explain how mismatched arguments can lead to duplicate scheduled events
• Add a usage example demonstrating correct and incorrect patterns

Notes

This is a documentation-only change. No functional behavior is modified.

Trac Ticket

https://core.trac.wordpress.org/ticket/43801

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