data: add Hume AI startup program

[yunaremaia]

Summary

Adds one new vendor, Hume AI (vendors/hu/hume-ai.yaml), with the vendor-run Hume AI Startup Program: discounted API access for early-stage startups, plus dedicated support, technical guidance, and build resources.

Reservation issue: #744

Facts and sourcing

All facts are taken from the single first-party source cited in the record:

• https://www.hume.ai/startup-program (verified live today)

Published facts captured in structured fields:

• Benefits (as published on the program page):
  • "Discounted API access for early-stage startups" → modeled as kind: other; the page publishes no percentage or dollar figure
  • "Dedicated support and technical guidance"
  • "Resources to help you build with empathic AI"
• Consideration: unknown — the page does not publish separate consideration terms; specific discounting is determined through contact with the vendor
• Eligibility: "early-stage startups" → manual rule (vendor-discretion), as the page publishes no machine-evaluable thresholds
• Access: public program page; the page's action channel is vendor contact ("Contact support" → /contact) → method: contact

No amounts were invented. The record states only what that page states.

Checklist

• Data-only PR: exactly one new vendor YAML under vendors/{shard}/ (shard hu from slug hume-ai)
• Fresh ULIDs generated per CONTRIBUTING (ent_, prg_, off_, opaque src_)
• Category from the pinned verifier taxonomy: ai-ml
• Local preflight run with the digest-pinned Catalog Verifier: {"status":"valid","vendors":1,"programs":1,"offers":1}
• DCO sign-off present on the commit
• Vendor not present in catalog; searched open issues/PRs before starting (reservation Reservation: Hume AI Startup Program #744)