refactor: align the Vime adapter with the linear_logp contract

[inaniloquentee]

Summary

• move the Vime adapter to the explicit linear_logp_provider path
• consume the model-neutral structural context without importing Vime dataclasses
• update runtime hook identity, the Qwen3 TP2/CP2 example, docs, and tests

Validation

• python -m pytest -q tests/test_vime_linear_logp_provider.py tests/test_vime_qwen3_example.py (13 passed)
• python -m compileall -q rl_engine tests/test_vime_linear_logp_provider.py tests/test_vime_qwen3_example.py
• git diff --check

[coderabbitai]

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[Flink-ddd]

LGTM