feat(ai): add safe benchmark harness

docs/work-programmes/session-handoff.md

@@ -2,17 +2,17 @@
 
 Updated: 2026-08-15
 
-- **Exact current task:** begin SEC-009 with the owner inventory/readable export, then implement the deletion lifecycle behind a disabled production gate.
-- **Last completed step:** implemented a recent-authenticated, rate-limited, redacted readable account ZIP with complete safe row/file inventory, checksums, warnings and Settings UX.
-- **Files currently modified:** account export service/API/rate policy, Backup Settings UI/translations, real-SQLite/backend/frontend/browser tests and SEC-009 evidence.
-- **Commands already run:** readable-export backend/API 11/11, backend 650/650, frontend focused 4/4 and full 234/234, backend/frontend builds and targeted Chromium ZIP response. The preceding VER-001 sidecar/Compose/preflight/full Playwright evidence remains current.
-- **Test results:** all listed local gates pass. Provider/native-AT/production cells remain explicitly partial, not run or blocked. Jest retains the documented force-exit/open-handle notice.
+- **Exact current task:** no independent implementation remains. SEC-009, PROD-001 read-only inventory/reporting and the PROD-003 plan-only benchmark harness are complete; continue only after a recorded blocker is authorized/resolved.
+- **Last completed step:** measured production hardware/runtime/backups read-only, documented rollout stops, then added a synthetic-only benchmark harness that defaults to no network execution.
+- **Files currently modified:** master progress/work-plan/handoff/decisions/blockers/evidence; SEC-009 verification; production hardware/rollout/benchmark reports; production backup checkpoint; Ollama benchmark script/tests.
+- **Commands already run:** SEC-009 focused backend 21/21, backend 657/657, frontend focused 8/8 and full 237/237, optimized build, EF parity, MariaDB script generation and Chromium 9/9; benchmark harness 4/4 plus plan-only dry run; sanitized read-only SSH inventory and gzip integrity across 21 existing dumps.
+- **Test results:** all repository gates pass. PROD-001 is PASS/PARTIAL because measured all-interface ports and incomplete/stale backup/restore evidence fail its safety acceptance. No model inference was run. Jest retains the documented open-handle notice.
 - **Services currently running:** none on task-owned ports 3000/5202. Playwright stopped its disposable API/Next servers. Pre-existing Docker services were not changed.
-- **Temporary files or processes:** no task-owned process is running and the failed disposable migration database was removed. Existing synthetic browser evidence/account and startup-created local backup remain documented. No provider account, real email, private content, paid service or production service was accessed.
-- **Production changes currently active:** none. No deployment, migration, provider connection/sync/send or production payload occurred.
-- **Rollback status:** downgrade `20260810080858_AddEmailDraftClientRequestId`, then `20260810075206_AddEmailDrafts`, before reverting draft commits; then follow the existing MAIL rollback order (`ee5ef7e`, `449faeb`, `123fc55`/`e9937ac`, ledger downgrade before `653f011`). No production migration/deploy/provider grant occurred.
-- **Uncommitted changes:** V-174 readable-export code/tests/docs; no dependency, schema or production configuration change. V-173 is pushed as `cdcc716`.
-- **Known failures:** live deployment is not verified because PR deploy is intentionally skipped and the active branch is not approved for merge. Draft export/API/UI, full thread/category actions and non-Gmail review remain; existing accounts need re-consent and IMAP stays read-only. A clean full-chain SQLite apply fails in the pre-existing JT-019 migration before the new draft migration. Browser/provider/MariaDB/production unavailable or unverified; recovery scan performance is unmeasured at large ledger scale; Jest open handles; SEC-006 parser dependency work is still separately gated; parser isolation remains SEC-007.
-- **Exact next action:** complete full Chromium after the export addition, commit/push V-174, then add the disabled additive deletion state and coordinator using the same owner inventory.
-- **Work that can continue independently:** SEC-009 repository-side owner inventory/export and disabled deletion lifecycle. UX/JOBS/PRODUCT production, MAIL provider mutations, SEC-006/007 and PROD packages retain their recorded external gates.
-- **Decisions still required from the user:** none for synthetic/code-inspected repository work. Any provider connection or send test, internet/package upgrades, private data, external/paid providers and production actions retain explicit approval/safety gates; SEC-009 retention/legal policy remains unresolved.
+- **Temporary files or processes:** no task-owned process is running. Playwright stopped its disposable API/Next servers. No raw benchmark output/evidence file was created.
+- **Production changes currently active:** none. Read-only SSH observed metadata/health/selected non-secret settings and backup integrity only. No log/private-row/content/secret read, deployment, migration, provider call, inference, model pull, restart, backup, restore or production file/config change occurred.
+- **Rollback status:** SEC-009 is additive migration `20260815164027_AddAccountDeletionLifecycle`. Keep deletion disabled, reconcile any durable request, and retain tombstones before downgrade. `842e793` is pushed. Production still runs `de937d25dc5e` / version `157`; its checkout has a pre-existing mode-only `deploy/deploy.sh` change that must be preserved/reviewed.
+- **Uncommitted changes:** documentation and the plan-only Ollama benchmark harness/tests following pushed SEC-009 commit `842e793`; no dependency, model, application runtime, schema or production state change in this checkpoint.
+- **Known failures:** PR 28's newest remote CI is not yet confirmed. Production publishes frontend 3000 and JobTracker Ollama 11434 on all interfaces; latest observed database-only backup is 2026-08-02; no complete files/keys/tombstone restore proof; root is 83% used; deployed AI sidecar is old direct-Gemini behavior; production script mode is dirty. SEC-006 internet access, SEC-007 dependency, provider/re-consent, Stripe price, signup, retention/legal, backup/restore, model execution/deployment and legacy cutover decisions remain recorded blockers. Historical JT-019 and Jest open handles remain.
+- **Exact next action:** after this documentation/harness checkpoint is committed and pushed, stop. Resume from the highest-priority blocker the user authorizes: recommended first is production network plus complete backup/scratch-restore safety, then bounded synthetic model benchmarking.
+- **Work that can continue independently:** none identified after the PROD-003 harness. Do not bypass blockers by pulling models, changing ports/firewalls, restoring data, contacting providers, or using package indexes without explicit authority.
+- **Decisions still required from the user:** production network/port mutation; complete backup and scratch restore; retention/tombstone/legal policy; model pull/synthetic production inference; deployment/worker activation; parser package-index access; provider/Stripe/signup actions; legacy cutover timing.