* add the desired fields to the table in dbconfig:  eg, dbconfig/chip.md contains the entries for chip processing
    dtime_photom        F32         0.0

 * add corresponding entries in the ippTool config .c code (eg, chiptoolConfig.c)
    psMetadataAddF32(addprocessedimfileArgs, PS_LIST_TAIL, "-dtime_photom",  0, "define elapsed time for photometry (seconds)", NAN);

 * add the entries (in eg ippTool/src/chiptool.c) to the add row functions (eg addprocessedimfileMode) and the corresponding row insert.  The new insert api will give a compile time error if the correct entries are not added.
    PXOPT_LOOKUP_F32(dtime_photom,  config->args, "-dtime_photom",  false, false);

 * add the corresponding entry to the ippconfig/recipes/ppStats.config file (eg CHIPSTATS METADATA)
  HEADER        STR     DT_PHOT  # elapsed time in photometry processing

 * add the corresponding entries to the STATS structure in the ippScripts .pl file (eg chip_imfile.pl):
  { name => "DT_PHOT",        type => "sum",   flag => "-dtime_photom",   dtype => "float" },

 * supply the header fields in the appropriate tool (eg, psphotDefineHeader)
  psMetadataAddF32 (header, PS_LIST_TAIL, "DT_PHOT", PS_META_REPLACE, "elapsed psphot time", psTimerMark ("psphot"));