kappa 5319bf3e4c refactor: comprehensive code review fixes and security hardening ...

Security:
- Add CSP headers for HTML reports (style-src 'unsafe-inline')
- Restrict origin validation to specific .kappa-d8e.workers.dev domain
- Add base64 size limit (100KB) for report data parameter
- Implement rejection sampling for unbiased password generation
- Add SQL LIKE pattern escaping for tech specs query
- Add security warning for plaintext password storage (TODO: encrypt)

Performance:
- Add Telegram API timeout (10s) with AbortController
- Fix rate limiter sorting by resetTime for proper cleanup
- Use centralized TIMEOUTS config for VPS provider APIs

Features:
- Add admin SSH key support for server recovery access
  - ADMIN_SSH_PUBLIC_KEY for Linode (public key string)
  - ADMIN_SSH_KEY_ID_VULTR for Vultr (pre-registered key ID)
- Add origin validation middleware
- Add idempotency key migration

Code Quality:
- Return 404 status when no servers found
- Consolidate error logging to single JSON.stringify call
- Import TECH_CATEGORY_WEIGHTS from config.ts
- Add escapeLikePattern utility function

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-29 11:36:08 +09:00

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