Jeremie Fraeys 58c1a5fa58 feat(audit): Tamper-evident audit chain verification system ... Add ChainVerifier for cryptographic audit log verification: - VerifyLogFile(): Validates entire audit chain integrity - Detects tampering at specific event index (FirstTampered) - Returns chain root hash for external verification - GetChainRootHash(): Standalone hash computation - VerifyAndAlert(): Boolean tampering detection with logging Add audit-verifier CLI tool: - Standalone binary for audit chain verification - Takes log path argument and reports tampering Update audit logger for chain integrity: - Each event includes sequence number and hash chain - SHA-256 linking: hash_n = SHA-256(prev_hash || event_n) - Tamper detection through hash chain validation Add comprehensive test coverage: - Empty log handling - Valid chain verification - Tampering detection with modification - Root hash consistency - Alert mechanism tests Part of: V.7 audit verification from security plan		2026-02-23 19:43:50 -05:00
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verifier_test.go	feat(audit): Tamper-evident audit chain verification system	2026-02-23 19:43:50 -05:00