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
*
     *   When we receive a transaction from a peer, we remove the txid from the
     *   peer's m_tx_in_flight set and from their recently announced set
     *   (m_tx_announced).  We also clear g_already_asked_for for that entry, so
     *   that if somehow the transaction is not accepted but also not added to
     *   the reject filter, then we will eventually redownload from other
     *   peers.
     */
    struct TxDownloadState {
        /* Track when to attempt download of announced transactions (process
         * time in micros -> txid)
         */
        std::multimap<std::chrono::microseconds, GenTxid> m_tx_process_time;
        
        std::set<uint256> m_tx_announced;
        
        std::map<uint256, std::chrono::microseconds> m_tx_in_flight;
        
        std::chrono::microseconds m_check_expiry_timer{0};
    };
    TxDownloadState m_tx_download;
    
    bool m_is_inbound;
    
    bool m_is_manual_connection;
    
    CRollingBloomFilter m_recently_announced_invs = CRollingBloomFilter{INVENTORY_MAX_RECENT_RELAY, 0.000001};
    
    bool m_wtxid_relay{false};
    CNodeState(CAddress addrIn, bool is_inbound, bool is_manual)