v1.3.0 — anonymous bucketing (__se_anon_id)

Implements the cross-SDK anonymous bucketing contract (18-identity-bucketing.md).

• Shipeasy::SDK::RackMiddleware mints the shared __se_anon_id first-party cookie for any request without one. Auto-mounted in Rails via a Railtie; for Sinatra/Hanami/bare Rack add use Shipeasy::SDK::RackMiddleware.
• Gate/experiment evaluations now default to the cookie id as anonymous_id, so logged-out visitors bucket consistently across server renders and the browser with no per-call wiring. The id is also on the Rack env as shipeasy.anon_id.
• Eval fix: a request with no user_id/anonymous_id now resolves a fully-rolled (100%) gate as on instead of always off, matching the TypeScript reference SDK.

v1.2.0 - usage telemetry

Per-evaluation usage telemetry (fire-and-forget beacons, default on; opt out with disable_telemetry).