Build and deploy a Discord community bot with fully explained code

Build a Discord bot called StudyBot for a 40-person Discord server for a college study group, and deploy it so it's actually running, not just code that would work in theory.

What the bot should do:
- Respond to these slash commands: /schedule, /remind, /poll.
- posts a daily 8am reminder of that day's study-group topic in a fixed channel — running automatically on a schedule or in response to an event, not only replying to commands.
- Log every command used (who, what, and when) to a simple database table so I can review usage later.

How to build this with me:
1. Start by explaining the overall architecture — the bot process, the command handlers, the scheduled or event-driven job, and where data is stored — before writing code. I want to understand the shape of it first.
2. Build and show me each command handler one at a time, with a plain-English explanation of what each one does and why it's structured that way.
3. Walk me through how Replit's deployment and always-on setup keeps the bot running, and what happens if it crashes or the Repl restarts. I want to actually understand the hosting model, not just trust that it works.
4. Use Replit Secrets for the bot token. Show me where that's configured and explain why it isn't hardcoded in the code.

Constraints:
- Python with discord.py — I've used Python before but never an async library
- Keep each command handler in its own clearly named file or function — more files I understand beats one big file I don't.
- After it's deployed, give me a short checklist for confirming it's actually live in my server.