Improve documentation structure and consistency

- Integrate advantages/limitations into descriptive paragraphs in store-mq.md
- Remove separate Advantages/Limitations subsections for cleaner structure
- Fix BEHIND_PROXY environment variable in bot.md documentation
- Add @fedify/sqlite dependency to docs package.json
- Update pnpm-lock.yaml accordingly

Co-Authored-By: Claude <noreply@anthropic.com>

Author: dahlia

docs/concepts/bot.md

@@ -473,7 +473,7 @@ BEHIND_PROXY=true deno serve -A --port 8000 ./bot.ts
 ~~~~
 
 ~~~~ bash [Node.js]
-node --experimental-transform-types ./bot.ts
+BEHIND_PROXY=true node --experimental-transform-types ./bot.ts
 ~~~~
 
 :::