fix(agents): fit default GAN cycle to worker memory

[FluffyAIcode]

Summary

• default the Agent GAN demo to one complete Generator/Critic cycle
• retain --rounds N for larger-memory workers
• document that growing agent history exceeded the current strict 300s remote-prefill timeout on round two

Live evidence

Generator round 1 and Critic round 1 both produced real model output. Generator round 2 correctly failed UNAVAILABLE after allens exceeded the remote-prefill timeout; Primary did not fall back to local prefill.

Tests

• Agent gate/privacy and report tests — 5 passed
• Python compile and diff checks pass

Made with Cursor

[cursor]

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