Record project continuation changes

backend/migrations/000027_fabric_service_channel_rebuild_alert_silences.up.sql

@@ -0,0 +1,17 @@
+CREATE TABLE IF NOT EXISTS fabric_service_channel_rebuild_alert_silences (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    cluster_id UUID NOT NULL REFERENCES clusters(id) ON DELETE CASCADE,
+    reporter_node_id UUID NOT NULL REFERENCES nodes(id) ON DELETE CASCADE,
+    route_id TEXT NOT NULL,
+    guard_status TEXT NOT NULL,
+    generation TEXT NOT NULL DEFAULT '',
+    reason TEXT NOT NULL DEFAULT '',
+    created_by_user_id UUID REFERENCES users(id) ON DELETE SET NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    expires_at TIMESTAMPTZ NOT NULL,
+    payload JSONB NOT NULL DEFAULT '{}'::jsonb,
+    UNIQUE (cluster_id, reporter_node_id, route_id, guard_status, generation)
+);
+
+CREATE INDEX IF NOT EXISTS idx_fsc_rebuild_alert_silences_active
+    ON fabric_service_channel_rebuild_alert_silences (cluster_id, expires_at DESC);