Discogs Copilot ext-v0.3.2 — cache scoping

Companion to server v1.3.2 (the rate-limit root-cause fixes — deploy/update that side first if self-hosting).

• Cached verdicts and the recently-analyzed trail are now cleared when the server URL or personal access token changes, so results can't leak across servers or accounts (sign-in/out already cleared them). A no-op Save in options keeps the warm cache.

Update (load-unpacked): git pull, then Reload (↻) in chrome://extensions — no re-auth needed.

Full Changelog: ext-v0.3.1...ext-v0.3.2