feat: batch connection logs to avoid DB lock contention (#23727)

- Running 30k connections was generating a ton of lock contention in the
DB

coderd/agentapi/connectionlog.go

@@ -85,7 +85,7 @@ func (a *ConnLogAPI) ReportConnection(ctx context.Context, req *agentproto.Repor
 		AgentName:        a.AgentName,
 		Type:             connectionType,
 		Code:             code,
-		Ip:               logIP,
+		IP:               logIP,
 		ConnectionID: uuid.NullUUID{
 			UUID:  connectionID,
 			Valid: true,

coderd/agentapi/connectionlog_test.go

@@ -152,7 +152,7 @@ func TestConnectionLog(t *testing.T) {
 					Int32: tt.status,
 					Valid: *tt.action == agentproto.Connection_DISCONNECT,
 				},
-				Ip:   expectedIP,
+				IP:   expectedIP,
 				Type: agentProtoConnectionTypeToConnectionLog(t, *tt.typ),
 				DisconnectReason: sql.NullString{
 					String: tt.reason,