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internal/database/migrations/0013_incidents.sql

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+CREATE TABLE incidents (
+    id uuid PRIMARY KEY,
+    correlation_key text NOT NULL CHECK (char_length(correlation_key) BETWEEN 1 AND 255),
+    title text NOT NULL CHECK (char_length(title) BETWEEN 1 AND 240),
+    summary text NOT NULL DEFAULT '' CHECK (char_length(summary) <= 2000),
+    severity text NOT NULL CHECK (severity IN ('attention', 'degraded', 'critical')),
+    status text NOT NULL DEFAULT 'open' CHECK (status IN ('open', 'acknowledged', 'resolved')),
+    started_at timestamptz NOT NULL,
+    resolved_at timestamptz,
+    owner_user_id uuid REFERENCES users(id) ON DELETE SET NULL,
+    correlation_method text NOT NULL CHECK (char_length(correlation_method) BETWEEN 1 AND 80),
+    confidence numeric(4,3) NOT NULL CHECK (confidence >= 0 AND confidence <= 1),
+    revision bigint NOT NULL DEFAULT 1 CHECK (revision > 0),
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CHECK (status <> 'resolved' OR resolved_at IS NOT NULL),
+    CHECK (status = 'resolved' OR resolved_at IS NULL)
+);
+
+CREATE UNIQUE INDEX incidents_active_correlation_key_uq ON incidents (correlation_key) WHERE status <> 'resolved';
+CREATE INDEX incidents_list_idx ON incidents (status, severity, updated_at DESC, id ASC);
+CREATE INDEX incidents_correlation_idx ON incidents (correlation_key, updated_at DESC, id ASC);
+
+CREATE TABLE incident_alerts (
+    incident_id uuid NOT NULL REFERENCES incidents(id) ON DELETE CASCADE,
+    alert_id uuid NOT NULL REFERENCES alert_instances(id) ON DELETE RESTRICT,
+    rationale text NOT NULL CHECK (char_length(rationale) BETWEEN 1 AND 500),
+    confidence numeric(4,3) NOT NULL CHECK (confidence >= 0 AND confidence <= 1),
+    correlation_method text NOT NULL CHECK (char_length(correlation_method) BETWEEN 1 AND 80),
+    is_manual boolean NOT NULL DEFAULT false,
+    added_by text NOT NULL DEFAULT '' CHECK (char_length(added_by) <= 160),
+    created_at timestamptz NOT NULL DEFAULT now(),
+    PRIMARY KEY (incident_id, alert_id)
+);
+
+CREATE INDEX incident_alerts_alert_idx ON incident_alerts (alert_id, incident_id);
+CREATE INDEX incident_alerts_incident_idx ON incident_alerts (incident_id, created_at ASC, alert_id ASC);
+
+CREATE TABLE incident_entities (
+    incident_id uuid NOT NULL REFERENCES incidents(id) ON DELETE CASCADE,
+    entity_id uuid NOT NULL REFERENCES entities(id) ON DELETE RESTRICT,
+    rationale text NOT NULL CHECK (char_length(rationale) BETWEEN 1 AND 500),
+    confidence numeric(4,3) NOT NULL CHECK (confidence >= 0 AND confidence <= 1),
+    created_at timestamptz NOT NULL DEFAULT now(),
+    PRIMARY KEY (incident_id, entity_id)
+);
+
+CREATE INDEX incident_entities_entity_idx ON incident_entities (entity_id, incident_id);