* fix: reduce reconnect redeploy and metrics load
Throttle node-online redeploy retries and lower the agent metric cadence so brief reconnect churn no longer fans out into repeated runtime syncs and backend connection pressure.
* docs: add follow-up implementation design notes
Document the planned flow upload batching work and the local remote-address toggle so the next changesets can implement them against an agreed design.
- controlForwardServices: skip offline nodes instead of failing entire operation,
so forward pause/resume/delete works when some entry nodes are offline
- onNodeOnline: always sync forward state on node reconnect (not just post-upgrade),
so forwards that changed status while a node was offline get synced
- add ListForwardIDsByNode repo method to sync all forwards (including paused)
- tunnel edit UI: allow deselecting already-selected offline nodes in
entry/chain/exit selectors, matching the backend's existing tolerance
The gcode.hostcentral.cc proxy only supports github.com file downloads,
not api.github.com requests. API calls through the proxy returned 404
HTML pages, causing JSON decode error: invalid character '<'.
Also updates repo name from flux-panel to flvx across upgrade and
install URLs.