Fix: robust response parsing, JSON patching, Weave init side-effects, E2 packaging, reward & tempfile fixes

[intertwine]

Motivation

• Harden environment code so evals and training don't crash on common edge cases (None content, non-dict completions, JSON Pointer array indices, tool failures).
• Prevent import-time side effects from auto-initializing tracing backends so downstream users can control Weave themselves.
• Fix correctness and packaging issues that cause reward inflation or broken installs for E2 so benchmarks and CI are reliable.

Description

• Make response normalization robust in sv_shared.utils.get_response_text() to return "" for None and handle non-dict list tails, and update sv_shared/utils_test.py with corresponding tests.
• Rework JSON Patch application in environments/sv-env-config-verification/patching.py to support JSON Pointer array indices, root-level ops, append (-), inserts, replaces and removals against lists and dicts.
• Ensure temporary files created during patch verification are always cleaned up by wrapping tool scans in a try/finally in environments/sv-env-config-verification/sv_env_config_verification.py.
• Fix severity-weighted scoring in environments/sv-env-config-verification/reward.py so true-positive weighting uses the oracle severity (preventing inflated scores).
• Remove invalid parallelize_scoring kwarg from the Red Team Attack vf.Rubric construction so load_environment() no longer raises a TypeError.
• Stop import-time Weave initialization: make sv_shared.initialize_weave_if_enabled() a lazy wrapper and enhance sv_shared/weave_init.py to detect existing external Weave client before calling weave.init(); update environments/tests/test_weave_init.py to mock get_client.
• Preserve all HuggingFace dataset fields when coercing E1 ClassLabel answers to strings by constructing a Features dict from the existing features in sv_shared/dataset_loader.py.
• Expand environments/sv-env-config-verification/pyproject.toml Hatch include patterns so built wheels include code, adapters, policies, data and docs.

Testing

• No full test suite was executed locally as part of this change; CI is expected to run pytest and the repo's existing workflows.
• Unit tests updated/added to cover the new behavior include sv_shared/utils_test.py (new edge cases for get_response_text) and environments/tests/test_weave_init.py (mocks weave.get_client to validate lazy init behavior).
• Changes are small and focused; please run make check / uv run pytest -q in CI or locally to validate the full test matrix after merging.

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