Add failing ORC thread-safety regressions and run all suites with nimble test

README.md

@@ -459,6 +459,15 @@ As much as possible, avoid complex operations that might themselves fail.
 Don't do heavy operations like database writes, complex network operations, or
 file system operations that might fail and cause cascading errors.
 
+## Testing
+
+Run `nimble test` for all unit, regression, and ThreadSanitizer ownership tests.
+It runs every suite even when an earlier suite fails. For focused debugging,
+use `nimble testUnit`, `nimble testRegression`, or `nimble testThreadSafety`.
+The regression tests currently expose known defects and are expected to fail
+until those defects are fixed. See [tests/README.md](tests/README.md) for commands,
+requirements, and coverage limitations.
+
 [log4j]: https://logging.apache.org/log4j/2.x/
 [logback]: https://logback.qos.ch/
 [effective logging level]: https://logback.qos.ch/manual/architecture.html#effectiveLevel