v1.3.0 — Basic auth fallback for old cameras

What's changed

• Basic auth fallback for old cameras — Older Hikvision models (e.g. DS-2CD8464F-EI) reject digest authentication entirely and only accept basic auth. When a camera returns a 401 whose WWW-Authenticate challenge doesn't offer Digest, the integration now retries with basic auth and sticks with it for the rest of the session (equivalent to curl --anyauth). A 401 from a camera that does offer Digest is still treated as bad credentials — no basic-auth retry — so the integration won't rack up extra failed logins toward Hikvision's account lockout.
• Docs — Committed the README documentation for the reconfigure flow and permission troubleshooting.