fix(distributed): follow current backend protocol

Master added Animate3D, negative_prompt, and context_size after this
branch diverged. The old suite did not exercise those paths, and Kokoros
no longer implemented the generated service trait.

Extend binary conformance across the tunnel owner and peer relay. Allow
long development versions so rebased binaries can register in PostgreSQL.
Clear the security findings introduced by the branch's new code.

Assisted-by: Codex:GPT-5 [apply_patch] [exec_command]
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