Upgrade node + bot optimization

[humanagent]

Move stress test worker management to module level and add manual termination via /stress reset command to improve worker lifecycle control

• Refactors stress test worker management in bots/stress/index.ts by moving workers to module scope and implementing manual cleanup through /stress reset command
• Updates test bot configuration in bots/test/index.ts to enable message mode and initial message sending
• Adds debug logging in bots/test/commands.ts for conversation ID, Ethereum address, inbox ID and installation ID
• Updates @xmtp/node-sdk from v1.0.0 to v1.0.4

📍Where to Start

Start with the worker management changes in bots/stress/index.ts where the workers variable has been moved to module scope and the cleanup logic has been relocated to the /stress reset command handler.

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Macroscope summarized 3c7508a.