Inserts a new §06 "Tracing & error capture" between the existing
"Tradeoffs by part" (§05) and the verdict (which moves to §07).
Includes the trace tree (HTTP → tRPC → controller → use-case → repo
→ Payload), capture-rules table (where captureException fires per
layer + the no-capture rule for defineErrorMiddleware), the
__sentryReported double-report guard explanation, and the R31–R38
PII rule list. Adds matching CSS (.trace-tree / .capture-rules /
.pii-rules) tuned to the existing dark-paper palette and Fraunces
heading font. Updates the contents nav from 6 → 7 columns.
di-explainer.html gets a new §08 "Instrumentation symbols" with cards
for TRACER and LOGGER, the bindAll() Rule-0 wiring path, and a note
on why feature containers also bind the symbols. Two-column grid
collapses to one on narrow viewports.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Danijel Martinek
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