feat(redirect80): new HTTP→HTTPS redirect service on port 80

Pure Python stdlib http.server + ThreadingMixIn, zero web framework deps.
- GET/HEAD → 301, POST/PUT/DELETE/PATCH → 308
- Reads Host header, strips port, redirects to https://{host}{path}
- Config via confs (retry_on_refused, hard dependency) + env var override
- Logs via log_client → db Logs table (fail-safe async batch)
- Port 80 privilege via setcap cap_net_bind_service in _run.sh

.gitignore

@@ -2,6 +2,7 @@ gateway/shufeng.ini
 core/Nidus.service.shufeng
 ai_review/.env
 confs/__pycache__/
+.workbuddy/
 libhttp/test_server
 *.pyc
 __pycache__/