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
remoteAddr);
        int64_t nTimeOffset = nTime - GetTime();
        pfrom.nTimeOffset = nTimeOffset;
        AddTimeData(pfrom.addr, nTimeOffset);
        
        if (greatest_common_version <= 70012) {
            CDataStream finalAlert(ParseHex("60010000000000000000000000ffffff7f00000000ffffff7ffeffff7f01ffffff7f00000000ffffff7f00ffffff7f002f555247454e543a20416c657274206b657920636f6d70726f6d697365642c2075706772616465207265717569726564004630440220653febd6410f470f6bae11cad19c48413becb1ac2c17f908fd0fd53bdc3abd5202206d0e9c96fe88d4a0f01ed9dedae2b6f9e00da94cad0fecaae66ecf689bf71b50"), SER_NETWORK, PROTOCOL_VERSION);
            m_connman.PushMessage(&pfrom, CNetMsgMaker(greatest_common_version).Make("alert", finalAlert));
        }
        
        if (pfrom.IsFeelerConn()) {
            pfrom.fDisconnect = true;
        }
        return;
    }
    if (pfrom.nVersion == 0) {
        
        Misbehaving(pfrom.GetId(), 1, "non-version message before version handshake");
        return;
    }
    
    const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
    if (msg_type == NetMsgType::VERACK)
    {
        if (!pfrom.IsInboundConn()) {
            
            LOCK(cs_main);
            State(pfrom.GetId())->fCurrentlyConnected = true;
            LogPrintf("New outbound peer connected: version: %d, blocks=%d, peer=%d%s (%s)\n",
                      pfrom.nVersion.load(), pfrom.nStartingHeight,