feat(#515): add investing eval harness

[adolago]

Summary

• add persisted investing eval datasets, golden snapshots, and replay runs for research artifacts, earnings packets, and portfolio briefings
• expose the harness through zee:invest-evals plus zee investing eval dataset ... and zee investing eval run ...
• document the eval state contract and add regression coverage plus telemetry for dataset and run activity

Validation

• bash scripts/bun-audit-ci.sh
• bash scripts/verify-skills.sh
• bun run --cwd packages/zee typecheck
• bun test --cwd packages/zee test/investing/evals.test.ts test/investing/thesis-queries.test.ts test/investing/portfolio-briefings.test.ts
• CI=true bun test --cwd packages/zee --reporter=dots --coverage-reporter=lcov
• cd packages/zee && bun run build
• cd packages/zee && ./script/verify-binary.sh
• exercised zee investing eval dataset create --json and zee investing eval run create --json against the built binary

Closes #515