Look up up to 100 company domains

Batch form of GET /companies?domain=…. Inputs are normalized and deduplicated in first-seen order. Each delivered hit costs 1 credit; misses are free. A miss reports whether review was durably queued, is pending enrichment, needs scope review, or is outside our coverage; no miss promises admission. Alias and former-domain hits include domain_match so a different canonical website is explicit rather than surprising.