add ability to write the full event to one singular target field #3996

Job	Run time
build-docs (3.11)	1m 48s
code-quality (3.11)	1m 9s
test / rust	17s
containerbuild / containerbuild (3.11)	8m 28s
test / python (3.11, unit)	2m 0s
containerbuild / containerbuild (3.12)	8m 48s
test / python (3.11, acceptance)	1m 45s
containerbuild / containerbuild (3.13)	7m 50s
test / python (3.12, unit)	2m 10s
test / python (3.12, acceptance)	2m 5s
test / python (3.13, unit)	2m 17s
test / python (3.13, acceptance)	2m 16s
	40m 53s

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