[Citadel Development] Daily commit digest for Citadel

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d57d06e80       Art Cancro      2023-05-23      ctdl3264: added diagnostics 
which revealed that CDB_VISIT is a hot mess and omg how did it ever work
c17e270f9       Art Cancro      2023-05-23      ctdl3264: fix zero length key 
in bigmsgs table
532d0f532       Art Cancro      2023-05-23      ctdl3264: skip zero length 
records, add more diagnostics