TDPilot 2.6.1 — Windows RTX qualification and reliable live checks

Windows RTX 5090 qualification on TouchDesigner 2025.33230, with fixes for operator discovery in sparse projects, fresh-cook performance evidence, Windows UTF-8/source handling and final-asset checksums.

• Full Windows suite: 2,268 passed, 43 explicit skips; one additional sampler regression passed. Golden evaluation: 102 passed.
• 29 live atomic checks plus native DAT undo/redo, cancellation after commit, unknown/expired receipt refusal and expired-request deduplication passed.
• Real stdio and HTTP MCP sessions passed on both protocol versions, with 114 tools. The actual configured Windows Codex launcher passed.
• 24 live scenarios, three generated-code runtime contracts and 16 bounded-control samples passed.
• Strict integrated release gates: 226 passed, zero failed or missing. Panel/render checks passed; synthetic WebSocket delivery verified 478/478 unique events.

Fresh cook measurements are per-operator CPU evidence, not whole-show FPS certification. Nuitrack sensor tracking remains unqualified without real hardware/license. Rollback covers watched graph state, not external I/O, arbitrary callback effects or process crashes.

See docs/UPDATE_2_6_1.md and the attached sanitized qualification summary. The original 2.6.0 tag/package was preserved.

Mac coordinator: synchronize the Mac runtime and component to 2.6.1 after this release.