hellogrok-cli 0.1.39: prenos za Windows

Added
- Managed inference_idle_timeout_secs for proxied channels: when a custom model does not configure Grok Build's per-chunk idle deadline, hellogrok temporarily materializes 1800 seconds (restored byte-for-byte on stop) so long relay stalls — queued generations that emit heartbeats but no content for many minutes — no longer hit the 600-second shell default. Explicit per-model or global [models] values remain user-owned and are never rewritten; first-party api.deepseek.com routes are excluded so their remote metadata stays authoritative (the watchdog below still protects them).
- Downstream content watchdog on every streaming path (native Chat/Messages/Responses passthrough and the translated Responses projections). It mirrors Grok Build's per-protocol "meaningful content" idle classification — text, reasoning, tool-call deltas, and terminal signals count; keepalive comments, usage-only chunks, empty deltas, and lifecycle bookkeeping events do not — and fires one 30-second margin before the client's own content-progress timer. On fire it closes the upstream body and emits a retryable proxy_stream_error, so a genuinely stalled stream re-enters Grok Build's native 15-attempt retry budget instead of dying on the client's non-retryable IdleTimeout. Watchdog activity is logged as SSE stalled: no content reached Grok Build for …; timeouts below 60 seconds disable the watchdog to respect explicit fast-fail choices.
Fixed
- A relay holding a stream with only keepalive bytes for longer than Grok Build's idle deadline (observed: GLM channels queuing for 3+ minutes with heartbeat-only frames) previously killed the turn permanently: the sampler's content-progress timer raises IdleTimeout, which is classified non-retryable, so neither the 15-attempt budget nor error-triggered compaction could save the turn. The turn now waits out stalls up to the managed deadline and degrades to a normal retryable failure past it.