Actually fix public rooms #1188

Job	Run time
check-lockfile	4s
changes	2s
lint-crlf	8s
lint-newsfile	35s
Typechecking	1m 28s
check-sampleconfig	36s
lint	44s
check-schema-delta	40s
lint-pydantic	53s
lint-clippy	0s
lint-clippy-nightly	0s
lint-rustfmt	0s
linting-done	2s
calculate-test-jobs	9s
trial-olddeps	6m 42s
portdb (3.8, 11)	4m 1s
complement (monolith, SQLite)	12m 13s
trial-pypy	0s
portdb (3.11, 15)	2m 53s
complement (monolith, Postgres)	13m 8s
complement (workers, Postgres)	20m 29s
cargo-bench	0s
cargo-test	0s
trial (3.8, sqlite, all)	4m 13s
trial (3.8, postgres, 11, all)	9m 56s
sytest (focal)	8m 38s
trial (3.8, sqlite)	3m 43s
sytest (focal, postgres)	10m 22s
sytest (focal, multi-postgres, workers)	13m 47s
sytest (focal, multi-postgres, workers, asyncio)	19m 28s
export-data	2m 10s
tests-done	1s
	2h 17m 5s

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