feat: add Watchdog recovery and drift rebuild workflows

src/routes/api/watchdog/+server.ts

@@ -0,0 +1,18 @@
+import { json } from '@sveltejs/kit';
+import { watchdogOverview, watchdogTick, setWatchdogEnabled } from '$lib/server/watchdog/index.js';
+import { kick } from '$lib/server/pipeline/worker.js';
+
+export function GET() { return json(watchdogOverview()); }
+export async function POST({ request }: { request: Request }) {
+    const body = await request.json().catch(() => null);
+    if (!body || typeof body !== 'object' || Array.isArray(body)
+        || (body.enabled !== undefined && typeof body.enabled !== 'boolean')
+        || (body.action !== 'scan' && typeof body.enabled !== 'boolean')
+        || (body.action !== undefined && body.action !== 'scan')) {
+        return json({ error: 'Provide action: scan or an enabled boolean.' }, { status: 400 });
+    }
+    if (typeof body.enabled === 'boolean') setWatchdogEnabled(body.enabled);
+    if (body.action === 'scan') await watchdogTick(true);
+    void kick().catch(err => console.error('[watchdog] worker kick failed:', err));
+    return json(watchdogOverview());
+}

src/routes/api/watchdog/[id]/+server.ts

@@ -0,0 +1,16 @@
+import { json } from '@sveltejs/kit';
+import { watchdogDetail, updateWatchdogIncident } from '$lib/server/watchdog/index.js';
+import { kick } from '$lib/server/pipeline/worker.js';
+
+export function GET({ params }: { params: { id: string } }) {
+    const detail = watchdogDetail(params.id);
+    return detail ? json(detail) : json({ error: 'Watchdog incident not found.' }, { status: 404 });
+}
+export async function POST({ params, request }: { params: { id: string }; request: Request }) {
+    const body = await request.json().catch(() => null);
+    if (!body || !['retry','dismiss'].includes(body.action)) return json({ error: 'Choose retry or dismiss.' }, { status: 400 });
+    const result = updateWatchdogIncident(params.id, body.action);
+    if (!result.ok) return json({ error: result.error }, { status: result.status });
+    void kick().catch(err => console.error('[watchdog] worker kick failed:', err));
+    return json(watchdogDetail(params.id));
+}