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Fourteenth pass: fromisoformat can't parse Rust Z-suffix timestamps on Python < 3.11 — crashes every timestamp deserialization (Q1/Q6/Q12 High), MarketSnapshot timestamp type inconsistent float vs datetime in same file (Q5 High), no #[serde(deny_unknown_fields)] — misspelled fields silently default (Q2 Medium), no upper-bound price validation (Q7 Medium), threading.Event.wait uses platform- dependent clock NTP jump risk (Q10 Medium). Backup diff reveals 6 critical bug fixes between backup and current. 275 total flaws across 14 passes. Co-authored-by: CommandCodeBot <noreply@commandcode.ai>