Fix reminder actor

[berkus]

Fix reminder actor to properly sleep, see tqwewe/kameo#238 for context.

[Copilot]

Pull Request Overview

This PR refactors the reminder actor to implement proper sleep functionality for scheduled tasks, addressing a specific issue with the actor's timing mechanism. The changes move from individual message handlers with blocking sleep operations to a centralized scheduling system using a min-heap and the actor's next() method.

Key changes:

• Replaced individual scheduling message handlers with a unified job queue system using BinaryHeap<ReminderJob>
• Implemented custom next() method to handle timed operations with tokio::select! for proper async sleep
• Added a new debug command for testing actor functionality

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
bot/src/commands/mod.rs	Adds module declaration and export for the new debug command
bot/src/commands/debug_command.rs	New debug command for testing actor functionality and bot health checks
bot/src/actors/reminder_actor.rs	Major refactor implementing job queue scheduling system with proper async sleep handling
bot/src/actors/bot_actor.rs	Updates to support the new reminder actor structure and adds debug message handling
bot/Cargo.toml	Reorders dependency declarations (cosmetic change)
Justfile	Adds default command to list available just commands
Cargo.toml	Updates kameo dependency version and reorders workspace configuration

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