feat: add daily request limit and refactor access control (#759)

- Add daily request limit per IP in blacklist settings (1-1,000,000/day)
- Refactor access control logic: merge blacklist and rate limit checks
- Remove RATE_LIMIT_API_DAILY_REQUESTS env var, use database config instead
- Move x-custom-auth check earlier in middleware chain
- Add comprehensive English documentation (31 new guide pages)
- Improve code structure and error handling

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

vitepress-docs/docs/en/guide/cli/d1.md

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+# Initialize/Update D1 Database
+
+When executing the wrangler login command for the first time, you will be prompted to log in. Follow the prompts to complete the login process.
+
+## Initialize Database
+
+```bash
+cd worker
+cp wrangler.toml.template wrangler.toml
+# Create D1 and execute schema.sql
+wrangler d1 create dev
+wrangler d1 execute dev --file=../db/schema.sql --remote
+```
+
+After creation, you can see the D1 database in the Cloudflare console.
+
+![D1](/readme_assets/d1.png)
+
+## Update Database Schema
+
+For `schema` updates, please confirm your previously deployed version.
+Check the [Changelog](https://github.com/dreamhunter2333/cloudflare_temp_email/blob/main/CHANGELOG.md)
+
+Find the `patch` file you need to execute and run it, for example:
+
+```bash
+cd worker
+wrangler d1 execute dev --file=../db/2024-01-13-patch.sql --remote
+wrangler d1 execute dev --file=../db/2024-04-03-patch.sql --remote
+```