* feat(proxy): add Webshare proxy pool import and sync
Adds Webshare (https://proxy.webshare.io) as a fourth source in the
free-proxy provider framework alongside 1proxy, Proxifly, and IPLocate.
WebshareProvider paginates the account's `/api/v2/proxy/list/` endpoint
(Authorization: Token <key>), upserts proxies into the shared
`free_proxies` table via the existing db/freeProxies.ts helpers, and
tombstones proxies the account no longer lists (recycled/retired IDs)
while never touching rows already promoted into the live proxy pool.
Unlike the other sources, Webshare is a paid per-account list, so it is
gated on FREE_PROXY_WEBSHARE_API_KEY rather than a plain on/off flag.
No DB migration needed — reuses the existing free_proxies table and
proxy_registry-on-promote path.
Co-authored-by: ricatix <d.enistraju155@gmail.com>
Inspired-by: https://github.com/decolua/9router/pull/1176
* chore(changelog): restore release entries + add webshare bullet
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Co-authored-by: ricatix <d.enistraju155@gmail.com>
