v4.6.3 — Homebrew upgrades keep hooks working

A patch release: Homebrew installs keep their hooks working across brew upgrade.

• Homebrew installs survive brew upgrade. install, init and server install used to wire hooks, plugins, MCP entries and service units to the resolved binary path, which under the cask is the versioned Caskroom/agentfeedback/<version>/agentfeedback that the next upgrade deletes. They now keep a symlink to the running binary, the path it was started as or an agentfeedback in any PATH directory, such as <prefix>/bin/agentfeedback. agentfeedback doctor names that same link.
• CLI: a leading --version is accepted and the flag hint is corrected.
• Distribution: the stable Homebrew cask is published from the release.
• Toolchain: built with Go 1.27.4.

Upgrading

Compatible with 4.x clients and servers; the HTTP API stays 1.0. No server configuration or database migration is required.

If you installed with the 4.6.2 Homebrew cask, run agentfeedback init (or agentfeedback install) once after brew upgrade. Entries 4.6.2 wired point at the deleted version directory and fail silently until rewired; agentfeedback doctor reports them as missing. Other install methods need nothing beyond the new binary.

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