Add logging for CNAME inspection

[DL6ER]

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• Add additional_info column to queries table. We fill it with the domain that caused blocking the entire CNAME chain.
• Log CNAME blocking to pihole.log
• Store + import ID of regex used for blocking in additional_info field
• Fix an edge-case where CNAME blocking can be foiled when parts of the CNAME chain are already in the cache
• Fix incorrect attribution of the blocked status to the wrong domain. This also simplifies the terminology in the CNAME inspection routine

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/regex-engine-improvements/34751/61

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-ftl-v5-2-released/36964/1

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/top-blocked-domain-not-showing-who-was-blocked/39217/21