release: publish KB 0.17.3

[0thernet]

Summary

• bumps @hraness/kb to the stable 0.17.3 patch over README architecture merge docs: restructure README around first verified task #16
• keeps the bundled Agent Skill, install examples, portfolio inventory, and release fixtures on the exact version
• records the README-only upgrade with no runtime API or package behavior change

Verification

• bun run check
• 1,196 tests passed
• exact 200-file package inventory: 4,861,496 unpacked bytes
• committed dist/ and bun.lock remained unchanged

Release continuation

Merging automatically stages the exact package through the npm-stage environment. A maintainer must inspect and promote the staged package with npm 2FA before v0.17.3 can be tagged and the immutable GitHub Release can be created.