data: add Unistam Startup Program

[Ezequiel-GH]

What changed

Adds Unistam Technology Services and its Startup Program, which offers eligible early-stage technology startups up to $50,000 in Simba Space cloud credits and related support.

Closes #587.

Sources

• https://unistamts.com/startups.php

Certification

• I changed only allowed repository content and did not mix vendor YAML with other paths.
• Public sources substantiate every submitted factual value; any Sourcey-written prose is a neutral summary, not a fabricated vendor quote.
• I did not author verification, provenance, freshness, or signature claims.
• My commits include a Signed-off-by line.

[auscaster]

Thanks for this. sourcey/validation is green, but the evidence pass for this head could not locate support for every submitted fact, so sourcey/admission cannot go green yet.

Uncovered on the record: /lifecycle.

Fix it on this same branch: either cite a public page that states the fact (add the URL to sources and reference its source_id from the record that needs it), or change the record to what the cited pages do say. Push to the branch and the checks re-run automatically.