feat: add Watchdog recovery and drift rebuild workflows

src/lib/watchdog.ts

@@ -0,0 +1,48 @@
+import type { DriftPlanFile } from './drift-plan.js';
+
+export type WatchdogState = 'open' | 'recovering' | 'attention' | 'resolved' | 'dismissed';
+export interface WatchdogIncident {
+    id: string;
+    server: string;
+    kind: 'health' | 'drift';
+    state: WatchdogState;
+    summary: string;
+    details: string;
+    first_seen_at: string;
+    last_seen_at: string;
+    finished_at: string | null;
+    failures: number;
+    cycle: number;
+}
+export interface WatchdogEvidence {
+    reason?: string;
+    containerState?: string | null;
+    files?: DriftPlanFile[];
+    fingerprint?: string;
+}
+export interface WatchdogAction {
+    id: string;
+    incident_id: string;
+    action: 'restart' | 'rebuild';
+    operation_id: string;
+    campaign_id: string | null;
+    created_at: string;
+    cycle: number;
+    operation_state: string | null;
+    operation_stage: string | null;
+    operation_error: string | null;
+}
+export interface WatchdogOverview {
+    enabled: boolean;
+    lastScanAt: string | null;
+    scanError: string | null;
+    incidents: WatchdogIncident[];
+}
+export interface WatchdogDetail {
+    incident: WatchdogIncident;
+    events: { id: number; created_at: string; message: string }[];
+    actions: WatchdogAction[];
+}
+export const watchdogStateLabels: Record<WatchdogState, string> = {
+    open: 'Detected', recovering: 'Recovering', attention: 'Needs attention', resolved: 'Resolved', dismissed: 'Dismissed'
+};