Handle situations where parsers create GuacNodes without the required identifier fields

[lumjjb]

As with https://github.com/guacsec/guac/issues/236, we saw a bug where a parser was allowed to create a GuacNode/Edge without filling up an identifier.

[codecov[bot]]

Codecov Report

Merging #17838 (2bcc78a) into main (a826720) will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #17838      +/-   ##
==========================================
- Coverage   66.45%   66.43%   -0.02%     
==========================================
  Files        1012     1012              
  Lines      108433   108433              
  Branches     2677     2677              
==========================================
- Hits        72058    72040      -18     
- Misses      32429    32447      +18     
  Partials     3946     3946              

Flag	Coverage Δ
unittests	66.43% <ø> (-0.02%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/controller/event/handler/auditlog/auditlog.go	14.28% <0.00%> (-46.43%)	:arrow_down:
src/controller/event/topic.go	2.11% <0.00%> (-6.34%)	:arrow_down:
src/jobservice/logger/sweeper/file_sweeper.go	56.25% <0.00%> (-6.25%)	:arrow_down:
src/jobservice/sync/schedule.go	54.54% <0.00%> (+1.58%)	:arrow_up:
...dashboard/schedule-card/schedule-card.component.ts	48.57% <0.00%> (+2.85%)	:arrow_up: