-- RFC-004 Phase 0 (GOO-172): transactional outbox for async messaging backbone.
-- Producers insert into event_outbox in the same tx as the domain change.
-- A single relay process (Postgres advisory-lock leader) tails pending rows
-- and publishes them to Redis Streams, then flips published_at.

CREATE TABLE "event_outbox" (
    "id" TEXT NOT NULL,
    "eventId" TEXT NOT NULL,
    "eventType" TEXT NOT NULL,
    "aggregateId" TEXT,
    "envelope" JSONB NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "publishedAt" TIMESTAMP(3),
    "attempts" INTEGER NOT NULL DEFAULT 0,
    "lastError" TEXT,

    CONSTRAINT "event_outbox_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX "event_outbox_eventId_key" ON "event_outbox"("eventId");

-- Hot path: relay scans `WHERE publishedAt IS NULL ORDER BY createdAt`.
CREATE INDEX "event_outbox_publishedAt_createdAt_idx" ON "event_outbox"("publishedAt", "createdAt");

-- Diagnostics: per-type backlog inspection.
CREATE INDEX "event_outbox_eventType_createdAt_idx" ON "event_outbox"("eventType", "createdAt");