Fix analyze schema fallback for runtime-specific ops

[fangyangci]

Summary

• handle missing ONNX schema lookups in runtime checker by converting SchemaError into OpUnsupportedError
• keep analysis running and classify those nodes as unknown/unsupported instead of failing the whole command
• reduce noisy per-node unsupported logs by downgrading OpUnsupportedError logging from error to debug
• add regression coverage for missing-schema behavior in runtime checker query helper tests

Validation

• uv run pytest tests/unit/analyze/core/test_runtime_checker_query_helpers.py
• uv run winml analyze -m "C:\Users\fangyangci.foundry\cache\models\Microsoft\qwen3-0.6b-cuda-gpu-2\v2\model.onnx" --debug

Notes

• uv.lock is intentionally excluded from this PR.

[Qiong Wu (qiowu) (DingmaomaoBJTU)]

The schema fallback keeps analyze running, but the current exception mapping loses the actual unsupported cause in normal results and suppresses unrelated unsupported-op diagnostics.