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wiki: split signed business ledger from device telemetry

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Correction before schema work: the events table conflated the anti-fraud
business ledger with device telemetry. Decision: ledger_events (signed,
chained, reconciled) holds only business facts; device_events (unsigned,
prunable) holds relay/printer/camera/reader/input telemetry. A raw button
press is telemetry; the entry flow mints a signed vehicle_entry. Drops
input_received-as-signed-event.

New: decisions/event-streams-split, concepts/device-events; updated
append-only-event-chain, index, log.
This commit is contained in:
Julian Çuni
2026-06-15 18:08:56 +02:00
parent 8a8e74561d
commit 9a4c7ee27b
5 changed files with 154 additions and 21 deletions
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wiki/index.md
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@@ -7,7 +7,7 @@ updated: 2026-06-14
# Index
Content catalog for the wiki. Start at [[overview]]. Maintained on every ingest.
Counts: 1 source · 18 entities · 21 concepts · 4 decision records.
Counts: 1 source · 18 entities · 23 concepts · 5 decision records.
## Overview & navigation
- [[overview]] — the top-level synthesis and entry point.
@@ -81,6 +81,7 @@ Counts: 1 source · 18 entities · 21 concepts · 4 decision records.
- [[clock-integrity]] — fees depend on the host clock; detect/flag backdating on an offline box.
- [[ticket-encoding]] — transient ticket id as QR; printed at entry, scanned at pay station + exit; plate-as-ticket alt.
- [[anti-passback]] — block/flag one id entering twice without an exit; fold over open sessions.
- [[device-events]] — unsigned hardware telemetry (relay/printer/camera/reader/input); separate from the signed ledger.
- [[permit]] — subscription; RF/QR or plate identity, registered-cars + max-concurrent, host-in-loop; short-circuits payment.
- [[opencv-anpr-service]] — host-side vision microservice: ANPR (plate identity) + vehicle verification (anti-plate-spoofing witness).
- [[blocklist]] — barred plates/cards refused at entry (never at exit); signed, attributed.
@@ -97,3 +98,4 @@ Counts: 1 source · 18 entities · 21 concepts · 4 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.
- [[event-streams-split]] — split the signed business ledger (ledger_events) from unsigned device telemetry (device_events).