/etc/logcheck/ignore.d.workstation/hcid is in logcheck-database 1.3.16.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ^\w{3} [ :0-9]{11} [._[:alnum:]-]+ hcid\[[0-9]+\]: HCI dev [0-9]+ (registered|up|down|unregistered)$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ hcid\[[0-9]+\]: (Stoping|Starting) security manager [0-9]+$
^\w{3} [ :0-9]{11} [._[:alnum:]-]+ hcid\[[0-9]+\]: link_key_request \([[:alpha:]]+=[:[:alnum:]]+, [[:alpha:]]+=[:[:alnum:]]+\)$
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