fix: adequate course key type in forum v2 #32544

Job	Run time
collect-and-verify	4m 17s
lms-1(py=3.11,dj=pinned,mongo=7.0)	10m 5s
lms-2(py=3.11,dj=pinned,mongo=7.0)	11m 57s
lms-3(py=3.11,dj=pinned,mongo=7.0)	15m 15s
lms-4(py=3.11,dj=pinned,mongo=7.0)	20m 16s
lms-5(py=3.11,dj=pinned,mongo=7.0)	11m 2s
lms-6(py=3.11,dj=pinned,mongo=7.0)	15m 53s
openedx-1-with-lms(py=3.11,dj=pinned,mongo=7.0)	11m 9s
openedx-2-with-lms(py=3.11,dj=pinned,mongo=7.0)	14m 35s
openedx-1-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 25s
openedx-2-with-cms(py=3.11,dj=pinned,mongo=7.0)	6m 37s
cms-1(py=3.11,dj=pinned,mongo=7.0)	4m 55s
cms-2(py=3.11,dj=pinned,mongo=7.0)	12m 44s
common-with-lms(py=3.11,dj=pinned,mongo=7.0)	9m 22s
common-with-cms(py=3.11,dj=pinned,mongo=7.0)	5m 48s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 49s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 56s
xmodule-with-cms(py=3.11,dj=pinned,mongo=7.0)	8m 37s
xmodule-with-lms(py=3.11,dj=pinned,mongo=7.0)	8m 25s
Unit tests successful	1s
coverage (3.11)	1m 40s
compile-warnings-report	11s
merge-artifacts	6s
	3h 19m 5s

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