Personalized follows and feed timeline added

Minor Changes

• 695039d: Add personalized follows + feed verbs: releases follow <org|product>, releases unfollow <org|product>, releases following (list), and releases feed (your personalized release timeline). They act on the signed-in user's account via the API's /v1/me/* routes — sign in with releases login (or set RELEASES_API_KEY) first. follow/unfollow accept an org slug, an org/product coordinate, or an org_…/prod_… id; feed reuses the same renderer as releases tail and is page-paginated (--page / --limit, --json). Requires @buildinternet/releases-api-types ≥ 0.32.0 for the follows wire types.
• de9ce26: Add releases source fetch <source> --dry-run: probe a single source without writing to D1 or dispatching (billing) the managed agent. For a client-rendered scrape source (crawlEnabled/renderRequired) it renders the index once via Browser Rendering and reports how many candidate release links were found — the cheap "can the steady-state cron render actually see releases here, or is it hitting an empty JS shell?" check that onboarding previously had no way to answer. For a feed/GitHub source it reports candidate releases parsed. Single source only; --json supported.