CREATE TABLE deployments (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    app_id UUID NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
    version INTEGER NOT NULL,
    image_ref VARCHAR(500) NOT NULL,
    desired_status VARCHAR(20) NOT NULL DEFAULT 'RUNNING',
    observed_status VARCHAR(20) NOT NULL DEFAULT 'BUILDING',
    orchestrator_metadata JSONB DEFAULT '{}',
    error_message TEXT,
    deployed_at TIMESTAMPTZ,
    stopped_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(app_id, version)
);

CREATE INDEX idx_deployments_app_id ON deployments(app_id);