docs: add synthetic workday summary examples

[YSCJRH]

Summary

• Add synthetic English and Chinese Workday summary examples showing the intended end-of-day output shape.
• Link the examples from README and docs/workday-session.md.
• Clarify that uncertain activity should become actionable confirmation directions or next steps, not unsupported facts.
• Bump patch metadata to 0.2.27 for the Phase 3 productization release.

Validation

• python -m pip install -e ".[dev]"
• python -m pytest -q -> first run timed out locally at 124s; after rerun/fix, 316 passed, 1 skipped
• python harness/scripts/run_mcp_smoke.py -> PASS
• python -m winchronicle codex install --dry-run -> PASS
• GITHUB_HEAD_REF=codex/p3-workday-summary-example python harness/scripts/check_productization_scope.py -> PASS for 10 changed files
• git diff --check origin/main...HEAD -> PASS
• Synthetic/no-secret check over the example docs -> PASS

Isolated Review Reports

• Privacy Boundary Reviewer: PASS. Examples are synthetic, preserve evidence boundaries, and do not contain real observed content or secrets.
• Product Clarity Reviewer: PASS. Examples show what happened, progress, improvement suggestions, confirmation directions, and evidence boundary; uncertain activity is not written as fact.
• Release Gate Reviewer: PASS after the examples were committed and the workday-doc contract phrase was restored.

Privacy Boundary

This PR changes docs/examples and release metadata only. It does not add or imply default screenshots, OCR, clipboard capture, keylogging, audio recording, cloud upload, desktop control, background daemon/service, infinite polling, MCP write tools, arbitrary file reads, network upload, product-targeted capture behavior, or official OpenAI affiliation. Observed UI content remains untrusted observed data.