[agent-network] Management: store, manager, synthesizer, policy engine, provider catalog, HTTP/gRPC API

Adds the account-scoped agent-network module: provider/policy/budget CRUD and
store, the reverse-proxy service synthesizer, policy selection + limit
enforcement, the provider catalog (incl. Vertex AI and AWS Bedrock entries),
and the management HTTP + proxy gRPC surfaces.

management/server/http/handlers/agentnetwork/access_log_handler.go

@@ -0,0 +1,91 @@
+package agentnetwork
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/gorilla/mux"
+
+	"github.com/netbirdio/netbird/management/server/agentnetwork/types"
+	nbcontext "github.com/netbirdio/netbird/management/server/context"
+	"github.com/netbirdio/netbird/shared/management/http/api"
+	"github.com/netbirdio/netbird/shared/management/http/util"
+)
+
+// addAccessLogEndpoints registers the read-only, server-side-filtered
+// agent-network access-log listing and the aggregated usage overview.
+func (h *handler) addAccessLogEndpoints(router *mux.Router) {
+	router.HandleFunc("/agent-network/access-logs", h.listAccessLogs).Methods("GET", "OPTIONS")
+	router.HandleFunc("/agent-network/usage/overview", h.getUsageOverview).Methods("GET", "OPTIONS")
+}
+
+func (h *handler) getUsageOverview(w http.ResponseWriter, r *http.Request) {
+	userAuth, err := nbcontext.GetUserAuthFromContext(r.Context())
+	if err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
+	}
+
+	// Reuse the access-log filter for the shared date/user/group/provider/model
+	// params; pagination/sort/search are irrelevant for an aggregate.
+	var filter types.AgentNetworkAccessLogFilter
+	if err := filter.ParseFromRequest(r); err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
+	}
+	// Bound the aggregation window so an unbounded or over-wide query can't load
+	// an account's entire usage history into memory.
+	filter.ApplyUsageOverviewBounds(time.Now())
+	granularity := types.ParseUsageGranularity(r.URL.Query().Get("granularity"))
+
+	buckets, err := h.manager.GetUsageOverview(r.Context(), userAuth.AccountId, userAuth.UserId, filter, granularity)
+	if err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
+	}
+
+	out := make([]api.AgentNetworkUsageBucket, 0, len(buckets))
+	for _, b := range buckets {
+		out = append(out, b.ToAPIResponse())
+	}
+	util.WriteJSONObject(r.Context(), w, out)
+}
+
+func (h *handler) listAccessLogs(w http.ResponseWriter, r *http.Request) {
+	userAuth, err := nbcontext.GetUserAuthFromContext(r.Context())
+	if err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
+	}
+
+	var filter types.AgentNetworkAccessLogFilter
+	if err := filter.ParseFromRequest(r); err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
+	}
+
+	rows, total, err := h.manager.ListAccessLogs(r.Context(), userAuth.AccountId, userAuth.UserId, filter)
+	if err != nil {
+		util.WriteError(r.Context(), err, w)
+		return
+	}
+
+	data := make([]api.AgentNetworkAccessLog, 0, len(rows))
+	for _, row := range rows {
+		data = append(data, row.ToAPIResponse())
+	}
+
+	pageSize := filter.GetLimit()
+	totalPages := 0
+	if pageSize > 0 {
+		totalPages = int((total + int64(pageSize) - 1) / int64(pageSize))
+	}
+
+	util.WriteJSONObject(r.Context(), w, api.AgentNetworkAccessLogsResponse{
+		Data:         data,
+		Page:         filter.Page,
+		PageSize:     pageSize,
+		TotalRecords: int(total),
+		TotalPages:   totalPages,
+	})
+}