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feat(iios): projection-cursor ledger + ProjectionCursorService (P9)

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Adds the doc-mandated IiosProjectionCursor (ordered high-water-mark +
rolling checksum per projection/topic/partition) and a reusable
ProjectionCursorService.advance(). The checksum is a deterministic fold over
the ordered event stream, so replaying the same events reproduces it — the
KG-06 proof that replay reproduces projection outcomes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Maaz Ahamed
2026-07-03 02:39:31 +05:30
parent cdb399a9c1
commit 1997fe48bb
7 changed files with 187 additions and 1 deletions
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packages/iios-service/src/test-utils/reset-db.ts
+1 -1
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@@ -8,7 +8,7 @@ import type { PrismaClient } from '@prisma/client';
export async function resetDb(prisma: PrismaClient): Promise<void> {
await prisma.$executeRawUnsafe(
`TRUNCATE TABLE
"IiosIdempotencyCommand","IiosDlqItem","IiosAuditLink",
"IiosProjectionCursor","IiosIdempotencyCommand","IiosDlqItem","IiosAuditLink",
"IiosMeetingActionItem","IiosActionItem","IiosTranscriptSegment","IiosMeetingTranscript","IiosMeetingSummary","IiosMeetingParticipant","IiosMeeting","IiosMeetingRequest",
"IiosCalendarSyncCursor","IiosCalendarEvent","IiosCalendarProviderAccount","IiosAvailabilityWindow",
"IiosAiEvidenceLink","IiosAiClaim","IiosAiToolCall","IiosAiArtifact","IiosAiModelRun","IiosAiJob","IiosEmbeddingRef",