RED: covers EVID-03 (normalized headers, structured auth verdicts,
Received chain, URLs, attachment metadata incl. related flag),
EVID-04 (no-network spy, truncated body preview), and the DoS size
guard (oversized buffer rejected before simpleParser). New synthetic
fixtures: rich multipart, auth-results-original, inline/CID attachment,
long-body, fuzzy-URL, and an oversized-buffer generator. None of these
exports exist on eml-parser.ts yet.
RED: covers all three selection tiers plus ambiguous/no-eml/empty edge
cases. lib/services/eml-parser.ts does not exist yet — tests fail to
resolve the module import.
