Tests

Add a column `participant` to `room_memberships` table #4381

Job	Run time
changes	3s
check-lockfile	5s
lint-crlf	4s
lint-newsfile	36s
lint	26s
check-sampleconfig	45s
check-schema-delta	45s
Typechecking	1m 12s
lint-pydantic	50s
lint-clippy	0s
lint-clippy-nightly	0s
lint-readme	0s
lint-rustfmt	0s
linting-done	4s
calculate-test-jobs	4s
trial-olddeps	6m 58s
portdb (3.9, 13)	15m 17s
complement (monolith, SQLite)	13m 46s
portdb (3.13, 17)	15m 17s
complement (monolith, Postgres)	14m 53s
cargo-bench	0s
complement (workers, Postgres)	15m 17s
cargo-test	0s
trial-pypy	0s
sytest (bullseye)	8m 37s
trial (3.9, sqlite, all)	6m 19s
sytest (bullseye, postgres)	10m 20s
trial (3.9, postgres, 13, all)	13m 34s
sytest (bullseye, multi-postgres, workers)	13m 6s
trial (3.9, sqlite)	5m 54s
sytest (bullseye, multi-postgres, workers, asyncio)	14m 55s
export-data	1s
tests-done	4s
	2h 39m 12s

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