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docs(wiki): phase B training path and hardware decisions — recorded, not built

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Claude-Session: https://claude.ai/code/session_01FWncR69HgGPuei1dLrW3cU
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Julian Çuni
2026-09-07 10:00:18 +02:00
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@@ -133,6 +133,7 @@ Counts: 4 sources · 19 entities · 47 concepts · 8 decision records.
- [[dingtian-vs-mqtt]] — transport choice: direct HTTP/UDP now, MQTT parked until multi-lane scale.
- [[session-model]] — business layer start: session = projection; transient-first; pay-on-foot. New event types.
- [[vision-service]] — build a host-side ANPR + vehicle-verification service; replaces edge-LPR; scoped AGPL exception.
- [[bodytype-classifier-training]] — phase B (SUV vs sedan) training path: trainer on the collector host → evaluate → publish weights → bake into the vision image → TAG bump; runs on the Xeon E3-1225 v5 CPU (feature-extraction head first, full fine-tune later), Quadro FX 3800 unusable, cloud GPU rejected (crops stay on premises). Decided 2026-09-07, NOT built.
- [[vision-service-packaging]] — the vision service lives in this monorepo (apps/vision/), separate process, wired into Turbo via a package.json shim; uv-managed Python.
- [[event-streams-split]] — split the signed business ledger (ledger_events) from unsigned device telemetry (device_events).
- [[desktop-shell-tauri]] — ✅ Tauri v2 chosen over Electron for the desktop kiosk shell; thin wrapper, server keeps all logic. Best case Ubuntu 26.04 LTS (resolves WebKitGTK); worst case Windows+WSL → kiosk browser, no native shell. Auto-updater mirrors signed releases to public `mca/public_releases` (source repo is private — field appliances have no Gitea creds).