feat: Profile task history and actual progress (0.5.8)

[duhu2000]

Summary

• Profile-persistent read-only history with immutable origin Workspace/Session and explicit source navigation; no projection rebinding.
• Real Session-event progress and terminal latch; distinct Provider data/zero/not-needed/denied/failed/unknown with strict wrappers.
• Preserve 0.5.6 authorization, Session singleton Sidebar, IME, human confirmation and immutable Excel/PDF reports.

Validation

• Local check: 45 files, 267 passed, 1 macOS-skipped Windows-only test; typecheck/build/docs/release/pack gates passed.
• Chromium: 8 light/dark/viewport cases passed.
• Isolated real DSH 0.1.2-rc.1 + Sidebar 0.18.1 / absent: business fixture, history, A/B, Tab X/collapse, restart and Excel/PDF passed. Synthetic Provider, no paid MCP/model acceptance.
• Known incompatible Sidebar 0.17.1 rejected by preflight and real host.
• Four-plugin entry switching PASS with cleaning 0.9.7 / previsit 0.1.22 / form-fill 0.2.28: independent Sessions, return to tender, explicit history origin navigation without projection rebinding, real restart persistence. The earlier form-fill 0.2.27 failure was a button-vs-link locator false negative, not an absent product entry. Full other-product business/Hot HMR remain unverified.

Release gate

Merge only after exact PR checks, then exact merged-main CI, annotated v0.5.8 tag and existing OIDC/provenance Release workflow. Adoption record: docs/HISTORY-PROGRESS-ADOPTION.md.