Fix container resource sampling and surface collection failures

src/lib/hosts.ts

@@ -69,6 +69,7 @@ export interface HostInventory {
     capabilities?: string[];
     agentUpdate?: HostAgentUpdate;
     instanceResources?: InstanceResources[];
+    instanceResourcesError?: string;
 }
 export interface InstanceResources {
     instanceId: string; generation: number; uptimeSeconds: number; cpuCores: number; memoryBytes: number;

src/lib/server/hosts/calibration.ts

@@ -15,6 +15,8 @@ interface AllowanceRow {
 function database() { const handle = db(); ensureHostSchema(handle); return handle; }
 
 export function validateInstanceResources(inventory: HostInventory): void {
+    if (inventory.instanceResourcesError !== undefined && (typeof inventory.instanceResourcesError !== 'string'
+        || inventory.instanceResourcesError.length > 500)) throw new Error('Invalid instance resource sampling error.');
     const samples = inventory.instanceResources;
     if (samples === undefined) return;
     if (!Array.isArray(samples) || samples.length > 1000) throw new Error('Invalid instance resource samples.');

src/routes/hosts/[id]/+page.svelte

@@ -62,7 +62,8 @@
                 <dt>{phase === 'startup' ? 'Starting a server' : 'Running a server'}</dt>
                 <dd>{allowance.cpuCores.toFixed(2)} CPU cores · {bytes(allowance.memoryBytes)} · {allowance.source === 'host' ? 'Learned on this host' : allowance.source === 'fleet' ? 'Learned from the fleet' : 'Calibrating; temporary allowance'} ({allowance.samples} samples)</dd>
             {/each}</dl>
-            {#if calibration.startup.source === 'bootstrap' || calibration.running.source === 'bootstrap'}<p>Learning begins as agent 1.4.3 or later reports running containers. Temporary allowances stay in use until enough measurements are available.</p>{/if}
+            {#if host.inventory.instanceResourcesError}<p role="status">{host.inventory.instanceResourcesError}</p>{/if}
+            {#if calibration.startup.source === 'bootstrap' || calibration.running.source === 'bootstrap'}<p>Use agent 1.4.6 or later for resource sampling. Measurements arrive with agent heartbeats and are combined into one peak sample per container per minute. The first five minutes after a container starts count toward startup; later measurements count toward running. Temporary allowances stay in use until enough measurements are available.</p>{/if}
         </section>{/if}
         <div class="grid"><section class="panel"><h2>Inventory</h2><dl>
             <dt>Hostname</dt><dd>{host.hostname || 'Pending'}</dd><dt>Agent</dt><dd>{host.inventory.agentVersion ?? 'Unknown'}</dd><dt>Platform</dt><dd>{host.inventory.os ?? 'Unknown'} · {host.inventory.architecture ?? 'Unknown'}</dd><dt>CPU</dt><dd>{host.inventory.cpu ?? 'Unknown'} ({host.inventory.cpuCount ?? '?'} cores)</dd><dt>CPU usage</dt><dd title="Average across all cores since the previous inventory sample">{host.inventory.cpuUsagePercent === undefined ? 'Not reported' : `${host.inventory.cpuUsagePercent.toFixed(1)}%`}{#if !host.connected && host.inventory.cpuUsagePercent !== undefined} (last reported){/if}</dd><dt>Memory available / total</dt><dd>{bytes(host.inventory.memoryAvailable)} / {bytes(host.inventory.memoryTotal)}</dd><dt>Game storage available / total</dt><dd>{bytes(host.inventory.storageAvailable)} / {bytes(host.inventory.storageTotal)}</dd><dt>Docker</dt><dd>{host.inventory.dockerVersion ?? 'Unknown'} · {host.inventory.dockerRunning ? 'Running' : 'Unavailable'}</dd><dt>Current operation</dt><dd>{host.inventory.currentOperation ?? 'None reported'}</dd>