feat(openrouter): update model YAMLs [bot]

[hganwani-droid]

Auto-generated by poc-agent for provider openrouter.

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Note

Low Risk
Low risk because this PR only updates static OpenRouter model YAML metadata (pricing, limits, supported features/params) with no executable logic changes; main risk is misconfiguration affecting cost/limit display or validation.

Overview
Updates multiple OpenRouter model YAMLs to enrich model metadata: adds/normalizes features, modalities, sources, thinking: true, and explicit max_tokens limits/params (including new reasoning_effort/reasoning fields and a removeParams entry for Mistral).

Introduces tiered pricing blocks for selected models (e.g., ByteDance Seed, Qwen3 Max, Xiaomi Mimo v2 Pro) and adjusts cost fields (e.g., Gemini adds input_cost_per_audio_token, Nemotron removes cache-read pricing) to reflect updated provider pricing/inputs.

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