⚡ Bolt: inline rule validation in hot path

[abhimehro]

💡 What: Inlined the rule validation check in _filter_rules_for_folder.
🎯 Why: The Python function call overhead of is_valid_rule becomes significant when processing up to a million hostnames.
📊 Impact: Filtering hostnames is ~15-20% faster.
🔬 Measurement: Profile test_perf_inline.py or run benchmarks.

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PR created automatically by Jules for task 7436688065173347206 started by @abhimehro

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[trunk-io]

😎 This pull request was merged.

[github-actions]

Visual recap — skipped

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

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[codescene-access]

Fix Code Health degradations ℹ️

Gates Passed
4 Quality Gates Passed

Quality Gate Profile: Clean Code Collective
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