fix(bindings): add SafeHandleWrapper + memory growth checks; bump 0.9.1 (#571)

- Introduce SafeHandleWrapper with gating, short drain wait, and deferred release on last in-flight exit.
- Wire Engine/Program/Rvm/CompiledPolicy to wrapper (centralized handle use, interop helper).
- Add C# memory growth tests (using/finalizer paths) and extend xtask C# runner options.
- Add pooled marshalling utilities, ResultHelpers, and API cleanups; update versions/changelog.

Fixes #570. Closes #554

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

bindings/java/Cargo.lock

@@ -826,7 +826,7 @@ checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
 
 [[package]]
 name = "regorus"
-version = "0.9.0"
+version = "0.9.1"
 dependencies = [
  "anyhow",
  "bincode",
@@ -856,7 +856,7 @@ dependencies = [
 
 [[package]]
 name = "regorus-java"
-version = "0.9.0"
+version = "0.9.1"
 dependencies = [
  "anyhow",
  "jni",