data: add CallMissed startup credits

[Himtome1]

What changed

Adds CallMissed and its startup credit program as one new Entity, one Program, and one Offer. The record captures the additional $1,000 API-credit value, platform-credit equivalent, eligible workloads, published startup focus, review route, and required application details.

Closes #1233

Sources

• https://www.callmissed.com/solutions/startups

Certification

• I changed only allowed repository content and did not mix Entity 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.

Validation

The pinned local Sourcey catalog verifier passes for exactly 1 Entity, 1 Program, and 1 Offer.