Check room membership before processing events in room resource #8366

All 769 tests pass, 2 skipped in 22m 59s

    1 files ±0     1 suites ±0 22m 59s ⏱️ -53s
771 tests ±0 769 ✔️ +2 2 💤 ±0 0 ❌ ±0
776 runs ±0 774 ✔️ +4 2 💤 ±0 0 ❌ - 2

Results for commit e8d8ef8. ± Comparison against earlier commit ebb034f.