grokers v0.1.1 — fail fast, fork policy, telemetry off

Changes since v0.1.0 (all verified on real runs)

• Unreachable local endpoint now fails in ~6 seconds with an actionable hint ("start ollama serve or re-run grokers-setup.sh") instead of silently retrying for ~6 minutes — the worst first-run footgun for users without ollama running.
• CONTRIBUTING/SECURITY rewritten for the fork: PRs welcome here (upstream accepts none); vulnerability reporting routed to this repo's advisories.
• All profiles now ship [features] telemetry = false in addition to auto_update = false.
• README: honest notes on residual upstream identifiers and Linux support status.

Tests: sampler/models/telemetry suites green (330 tests). Full verification battery: no-account boot, local-model coding loop, Anthropic x-api-key on the wire, dead-endpoint fast-fail.