chore(portfolio): add content intelligence reviewer packet

[grant-mccurdy]

Summary

• add reviewer-facing visual evidence and clearer entry points
• document code, content, and data licensing
• add CI for deterministic portfolio generation and serving tests

Validation

• make portfolio-demo
• rebuilt 237 information objects
• passed 5 retrieval fixtures and 6 serving tests with no tracked drift

Public safety

The reviewer packet contains approved public examples only and preserves the project's source-boundary controls.

Closes #6

[grant-mccurdy]

Reviewed the final diff and green portfolio-demo job. The regenerated 241-object corpus, 5 retrieval fixtures, and 6 serving tests are consistent with the expanded README; the source-boundary and licensing additions remain public-safe. No blocking findings.