Add SafeRegex module to have centralized regex match #25
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Extracted from Front.SafeRegex and Scheduler.SafeRegex (near-duplicate copies kept in sync by hand). Caps pattern at 512 bytes and value at 4096 bytes; relies on PCRE's match_limit to short-circuit runaway matches. Public API: max_pattern_length/0, max_value_length/0, validate_pattern/1, match/2. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
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Util.SafeRegex— bounded regex matching for parameter input format validation. Caps pattern at 512 bytes, value at 4096 bytes, and relies on PCRE'smatch_limitto short-circuit runaway matches (basic ReDoS mitigation).Test plan