1. fxt MCP server tests: set XDG_CONFIG_HOME to writable temp dir
in test helper. On CI, $HOME=/root/ but pod runs as uid 1000,
so FileTokenStorage::new() fails reading /root/.config/.
2. risk test_hf_gate_check: remove sub-100μs latency assertion
(correctness test, not benchmark — flaky under CPU contention).
3. ml-labeling fractional_diff: remove sub-1μs latency assertions
from correctness tests (latency benchmark is already #[ignore]d).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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