### CONTEXT (Previous Events):
<system_output timestamp="2638.77087">Setting up libpython3-stdlib:i386 (3.11.2-1+b1) ...
Setting up linux-image-686-pae (6.1.106-3) ...
</system_output>
<system_output timestamp="2638.778321">Setting up efibootmgr (17-2) ...
</system_output>
<system_output timestamp="2638.779747">Setting up openssh-sftp-server (1:9.2p1-2+deb12u3) ...
Setting up python3.11 (3.11.2-6+deb12u2) ...
</system_output>
<system_output timestamp="2640.107785">Setting up libnfsidmap1:i386 (1:2.6.2-4) ...
</system_output>
<system_output timestamp="2640.112997">Setting up openssh-server (1:9.2p1-2+deb12u3) ...
</system_output>
<system_output timestamp="2640.379245">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2640.419726">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2644.780686">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2644.791168">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2644.796679">Creating SSH2 ECDSA key; this may take some time ...</system_output>
<system_output timestamp="2644.805495">
</system_output>
<system_output timestamp="2644.815544">256 SHA256:ZZNFdD/xbi+zkUP3Sn7estznMtkmXS2yIP3vR3mw9nk root@faiserver (ECDSA)
</system_output>
<system_output timestamp="2644.818672">Creating SSH2 ED25519 key; this may take some time ...</system_output>
<system_output timestamp="2644.835048">
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="2644.844499">256 SHA256:ZKnVRk/eCqrPIS/k+SaKgHZKaN75dgnbyGxrtT6NqR0 root@faiserver (ED25519)
</system_output>

Answer: 2644.844499, old event