during a cursory investigation for #163 I found that the code handling
Link headers would not handle non-numeric post IDs like pleroma's
flakeIDs correctly
IDs starting with a number would be truncated to the first non-digit,
and IDs not starting with a number would throw. Thankfully, all flakeIDs
generated so far start with 9. Maybe 8 for the earliest ones, I'm not
sure. Either way, so far it would only have misbehaved when using the
pagination functions or accessing the _pagination_prev and
_pagination_next attributes directly
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