AFAICT, as of commit a0a422c,  we have 2 different logics to evict outbound peers : lagging-chain (`ConsiderEviction`) and (`CheckForStaleTipAndEvictPeers`). The former to sanitize out lazy/buggy peers who have never sent us a valid header and are always staying behind our tip, the latter triggered in case of stale tip due to block variance to seek a better chain by rotating our outbound peers if we already reach an outbound limit (`EvictExtraOutboundPeers`).

Block-relay-only peers were introduced by #15719. Contrary to outbound full-relay peers who provided us at least a useful header, they're not protected by lagging-chain eviction.

We actually have a comment inside `ProcessHeadersMessage` indicating the contrary behavior. We should either document cleanly that block-relay-only aren't protected or effectively extend the scope of protection to them.

Hinted during #19724 review, see https://github.com/bitcoin/bitcoin/pull/19724#discussion_r475144532
state.m_tx_download.m_tx_announced.erase(gtxid.GetHash());
                state.m_tx_download.m_tx_in_flight.erase(gtxid.GetHash());
            }
        }
        if (!vGetData.empty())
            m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::GETDATA, vGetData));
        
        
        
        if (pto->m_tx_relay != nullptr && pto->GetCommonVersion() >= FEEFILTER_VERSION && gArgs.GetBoolArg("-feefilter", DEFAULT_FEEFILTER) &&
            !pto->HasPermission(PF_FORCERELAY) 
        ) {
            CAmount currentFilter = m_mempool.GetMinFee(gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFeePerK();
            int64_t timeNow = GetTimeMicros();
            static FeeFilterRounder g_filter_rounder{CFeeRate{DEFAULT_MIN_RELAY_TX_FEE}};
            if (m_chainman.ActiveChainstate().IsInitialBlockDownload()) {
                
                
                currentFilter = MAX_MONEY;
            } else {
                static const CAmount MAX_FILTER{g_filter_rounder.round(MAX_MONEY)};
                if (pto->m_tx_relay->lastSentFeeFilter == MAX_FILTER) {
                    
                    
                    pto->m_tx_relay->nextSendTimeFeeFilter = timeNow - 1;
                }
            }
            if (timeNow > pto->m_tx_relay->nextSendTimeFeeFilter) {
                CAmount filterToSend = g_filter_rounder.round(currentFilter);