Add configurable retention for successful routine operations

src/lib/server/hosts/observations.ts

@@ -0,0 +1,18 @@
+export const observationKinds = ['host.inspect', 'instance.inspect', 'files.read', 'files.list', 'files.stat', 'files.manifest', 'logs.read'];
+const commands = ['status', 'getstatus', 'version'];
+
+export function successfulObservation(kind: string, payload: Record<string, unknown>, result: unknown): boolean {
+    const routine = observationKinds.includes(kind) || kind === 'rcon.execute' && commands.includes(String(payload.command));
+    const value = result && typeof result === 'object' ? result as Record<string, unknown> : {};
+    return routine && value.ok !== false && value.healthy !== false && (value.error == null || value.error === '');
+}
+
+/** Uses the operation alias o; serialized payloads may live outside the routing row. */
+export const routineObservationSql = `(o.kind IN (${observationKinds.map(kind => `'${kind}'`).join(',')})
+    OR (o.kind='rcon.execute' AND json_extract(COALESCE(
+        (SELECT p.payload FROM ec_host_operation_payloads p WHERE p.operation_id=o.id),o.payload),'$.command') IN ('status','getstatus','version')))`;
+
+export const successfulObservationSql = `(o.state='completed' AND COALESCE(o.error,'')='' AND ${routineObservationSql}
+    AND CASE WHEN o.result IS NULL THEN 1 WHEN json_valid(o.result)
+        THEN json_extract(o.result,'$.ok') IS NOT 0 AND json_extract(o.result,'$.healthy') IS NOT 0
+            AND COALESCE(json_extract(o.result,'$.error'),'')='' ELSE 0 END)`;