Support for custom / bring-your-own proxies on LinkedIn channels

Allow customers to assign their own custom proxy (IP) to each connected LinkedIn account, the way GetSales and similar LinkedIn automation tools do today. Why it matters: customers running multiple LinkedIn accounts (e.g. "mirror" profiles for outreach at scale) need each account to keep a consistent, distinct IP so LinkedIn doesn't flag multiple accounts as linked to the same operator. Sendr's LinkedIn connection flow (Settings > Channels > Add channel > LinkedIn) is a standard OAuth-style authorization with no field for entering a proxy, and all LinkedIn actions run through Sendr's Unipile-backed cloud automation with no customer-facing IP/proxy control. Customer context: Tony (Talent Architects) currently uses GetSales for his mirror-profile accounts specifically because it supports custom proxies, and asked whether Sendr offers an equivalent before switching outreach tools for those accounts.