feat(ECR-031): CrisisCare CrisisEvent 只读并 Closed

CrisisEvent catalog (000032) · Loop continuous.

apps/api/migrations/000032_crisis_events.down.sql

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+DROP TABLE IF EXISTS crisis_events;

apps/api/migrations/000032_crisis_events.up.sql

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+-- ECR-031 CrisisEvent (read catalog)
+
+CREATE TABLE IF NOT EXISTS crisis_events (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  code varchar(64) NOT NULL UNIQUE,
+  title varchar(128) NOT NULL,
+  severity varchar(16) NOT NULL CHECK (severity IN ('high','critical')),
+  active boolean NOT NULL DEFAULT true,
+  system boolean NOT NULL DEFAULT false,
+  created_at timestamptz NOT NULL DEFAULT now(),
+  updated_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_crisis_events_active ON crisis_events(active);
+
+INSERT INTO crisis_events(code, title, severity, active, system)
+VALUES ('demo_crisis_event', '示例危机事件占位', 'high', true, true)
+ON CONFLICT (code) DO NOTHING;