docs: close upstream cycle #981 and advance cursor to 99e08526e5

[rynfar]

Closes #981. Closes #963.

Records outcomes for all 30 sources in 921cb3c8bc..99e08526e5 and advances reviewed-through to 99e08526e5ec84f294940cba5929841518c52fec. Advancing the cursor records decisions; it does not mean everything was adopted, released or installed.

• Adopted or adapted: fix(web): adopt upstream hotkey, header and code-block polish #982, fix(desktop): preview downloads skip Save dialogs and dark-mode pages stay visible #983, fix: cloned projects show their favicon instead of a monogram #984, perf(server): batch background GitHub PR polling through GraphQL (upstream #14673) #985, fix(mobile): scene-based sizing, stale Live Activity and per-thread notification grouping (upstream) #986, feat(web): beta Working sidebar section (upstream) #991, feat(web): update providers on all connected machines (upstream) #992, feat: start a new project from just a name (upstream) #993, feat: start threads without a project (Scratch) (upstream) #994. feat: start threads without a project (Scratch) (upstream) #994 also adopts 6b286ae8a2 (Scratch), which completes design review Design review: start threads without a project (upstream #13612) #963.
• Deferred as DEF-22: the Expo SDK 58 / React Native 0.88 RC series.
• Skipped or covered: 7 sources, unchanged from the triage on Upstream integration cycle: 921cb3c8bc..99e08526e5 (30 sources) #981.
• Deferred register: removes the "Threads without a project" row (now adopted) and adds DEF-22.

This PR changes documentation only. vp fmt --check passes on the ledger.

🤖 Generated with Claude Code

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[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	4.9 KiB	4.9 KiB	0 B (0.0%)	6.8 KiB	✅
Codex	Thread snapshot wire	3.7 KiB	3.7 KiB	0 B (0.0%)	4.9 KiB	✅
Codex	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Codex	Live turn WebSocket decoded	20.4 KiB	20.4 KiB	0 B (0.0%)	29.3 KiB	✅
Codex	Live turn messages	2	2	0 (0.0%)	8	✅
Claude	Total thread wire	4.9 KiB	4.9 KiB	0 B (0.0%)	6.8 KiB	✅
Claude	Thread snapshot wire	3.7 KiB	3.7 KiB	0 B (0.0%)	4.9 KiB	✅
Claude	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Claude	Live turn WebSocket decoded	20.8 KiB	20.8 KiB	0 B (0.0%)	29.3 KiB	✅
Claude	Live turn messages	2	2	0 (0.0%)	8	✅

Baseline: 83389d7 · PR result: 2bcb933 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 106.1 KiB
• Claude decoded thread snapshot: 106.4 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.