feat(hub): add network probe API, sync, result collection, and aggregation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/hub/systems/system_probes.go

@@ -0,0 +1,59 @@
+package systems
+
+import (
+	"context"
+	"time"
+
+	"github.com/henrygd/beszel/internal/common"
+	"github.com/henrygd/beszel/internal/entities/probe"
+	"github.com/pocketbase/dbx"
+	"github.com/pocketbase/pocketbase/core"
+)
+
+// SyncNetworkProbes sends probe configurations to the agent.
+func (sys *System) SyncNetworkProbes(configs []probe.Config) error {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	var result string
+	return sys.request(ctx, common.SyncNetworkProbes, configs, &result)
+}
+
+// FetchNetworkProbeResults fetches probe results from the agent.
+func (sys *System) FetchNetworkProbeResults() (map[string]probe.Result, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	var results map[string]probe.Result
+	err := sys.request(ctx, common.GetNetworkProbeResults, nil, &results)
+	return results, err
+}
+
+// fetchAndSaveProbeResults fetches probe results and saves them to the database.
+func (sys *System) fetchAndSaveProbeResults() {
+	hub := sys.manager.hub
+
+	// Check if this system has any probes
+	count, err := hub.CountRecords("network_probes",
+		dbx.NewExp("system = {:system} AND enabled = true", dbx.Params{"system": sys.Id}))
+	if err != nil || count == 0 {
+		return
+	}
+
+	results, err := sys.FetchNetworkProbeResults()
+	if err != nil || len(results) == 0 {
+		return
+	}
+
+	collection, err := hub.FindCachedCollectionByNameOrId("network_probe_stats")
+	if err != nil {
+		return
+	}
+
+	record := core.NewRecord(collection)
+	record.Set("system", sys.Id)
+	record.Set("stats", results)
+	record.Set("type", "1m")
+
+	if err := hub.SaveNoValidate(record); err != nil {
+		hub.Logger().Warn("failed to save probe stats", "system", sys.Id, "err", err)
+	}
+}