feat(seer): Add lightweight supergroups backfill task #249301

Job	Run time
detect what files changed	10s
api docs test	5m 45s
backend migration tests	11m 22s
backend typing	4m 30s
cli test	1m 58s
check migration	1m 12s
select tests	28s
monolith-dbs test	7m 9s
api url typescript generation	-1s
requirements check	-1s
calculate test shards	5s
backend test (2)	13m 58s
backend test (5)	13m 28s
backend test (1)	13m 52s
backend test (0)	12m 55s
backend test (8)	14m 53s
backend test (4)	13m 57s
backend test (3)	13m 58s
backend test (9)	14m 32s
backend test (6)	13m 38s
backend test (12)	14m 28s
backend test (18)	13m 17s
backend test (17)	13m 48s
backend test (14)	12m 40s
backend test (21)	14m 39s
backend test (15)	13m 54s
backend test (13)	13m 57s
backend test (11)	13m 54s
backend test (20)	13m 58s
backend test (16)	13m 55s
backend test (10)	13m 26s
backend test (19)	13m 25s
backend test (7)	14m 35s
Backend	2s
	5h 37m 46s

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