fix(analyzers): avoid nominal MP3 and P6 matches

[rng1995]

Summary

• recognize the complete state-coverage enumeration around initial/reset state as a nominal MP3 context
• recognize the declarative selector taxonomy around descendant/compound/print rules as a nominal P6 context, including its single logical-line wrap
• keep suppression bounded and fail closed around directive framing, incomplete windows, and referential continuations
• add exact-source, malicious near-miss, mixed-content, logical-line, and boundary regressions

The guards are analyzer-local and positive-shape based. They do not whitelist documentation, code, paths, or file types, so direct and framed extraction/state-manipulation instructions remain findings.

Validation

• ruff check src/ tests/
• ruff format --check src/ tests/
• pytest -q tests/unit/test_patterns_new.py — 473 passed
• pytest -q -m "not integration and not provider" tests/ — 3,138 passed, 14 skipped, 4 xfailed
• full skillspector scan --no-llm of the reported skill — zero MP3/P6 findings from the two benign passages

Signed-off-by: Narendran Raghavan nraghavan@nvidia.com