Fixed
- #228 Fix database health check for Oracle — use
SELECT 1 FROM DUALinstead ofSELECT 1which Oracle does not support without aFROMclause - #231 Raise
TypeErrorwhenWATCHMAN_CHECKSis a string instead of a sequence — prevents confusingImportErrorwhen parentheses are used without a trailing comma (e.g.('single.check'))