[client] introduce client-side event aggregation (#6627)

* added an implementation of aggregating memory store

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* initial support for aggregation of events

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* added tcp-aggregation test

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* added manager integration test

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* added tracking of the number of start-, drop, and end-events in an aggregation window

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* fixes based on sonarcube checks

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* regenerated proto files

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* removed inadvertenly added google proto files

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* pacifying linter

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* update test to validate event aggregation over tcp, udp, icmp, and icmpv6

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* updated event aggregation test

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* regenerate protobufs with expected versions of protoc and protoc-gen-go

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* remove protoc/protoc-gen headers from flow_grpc.pb.go

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* updated openapi spec

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* updated openapi NetworkTrafficEvent spec, regenerated types

Signed-off-by: Dmitri <dmitri.external@netbird.io>

* respond to feedback

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fixed an issue with how we track events that shouldn't be aggregated

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fixed mapping of events to protobuf

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* icmp code values in aggregated events do not matter

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* regenerate openapi types

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* added a comment re: unbounded unacked events

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* reset aggregated event type to unknown

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fix event aggregation test

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* used the source port of the earliest event

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* add tracking of window starts and ends

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* updated openapi spec

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* reverted changes to generate.sh

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* cleanup handling of not-aggregated events + test

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* responded to feedback + small fixes

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* small fix in a test

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* another test

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* force setting non-empty rule id on aggregated events

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fixed a couple of issues flagged by coderabbit

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* fix spelling

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

* handle exhausted retry backoffs

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

---------

Signed-off-by: Dmitri <dmitri.external@netbird.io>
Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>

client/internal/netflow/logger/logger.go

@@ -27,7 +27,7 @@ type Logger struct {
 	wgIfaceNetV6       netip.Prefix
 	dnsCollection      atomic.Bool
 	exitNodeCollection atomic.Bool
-	Store              types.Store
+	Store              types.AggregatingStore
 }
 
 func New(statusRecorder *peer.Status, wgIfaceIPNet, wgIfaceIPNetV6 netip.Prefix) *Logger {
@@ -35,7 +35,7 @@ func New(statusRecorder *peer.Status, wgIfaceIPNet, wgIfaceIPNetV6 netip.Prefix)
 		statusRecorder: statusRecorder,
 		wgIfaceNet:     wgIfaceIPNet,
 		wgIfaceNetV6:   wgIfaceIPNetV6,
-		Store:          store.NewMemoryStore(),
+		Store:          store.NewAggregatingMemoryStore(),
 	}
 }
 
@@ -125,6 +125,10 @@ func (l *Logger) stop() {
 	l.mux.Unlock()
 }
 
+func (l *Logger) ResetAggregationWindow() types.FlowEventAggregator {
+	return l.Store.ResetAggregationWindow()
+}
+
 func (l *Logger) GetEvents() []*types.Event {
 	return l.Store.GetEvents()
 }