Investigates SQLite UPSERT semantics, FK enforcement per-connection
requirement, http.MaxBytesReader behavior, and t.Fatal test patterns.
All four DATA-0x bugs confirmed with authoritative sources and line
numbers. No open blockers; ready for planning.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Parallel analysis of tech stack, architecture, structure,
conventions, testing patterns, integrations, and concerns.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>