Enable SCOPE_POOL globally across all platforms and refactor pooling logic to enhance robustness, efficiency, and cleanup mechanisms. Update documentation to reflect changes.

lynglib/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt

@@ -1734,7 +1734,7 @@ class Compiler(
             // Rebind error scope to the throw-site position so ScriptError.pos is accurate
             val throwScope = sc.createChildScope(pos = start)
             if (errorObject is ObjString) {
-                errorObject = ObjException(throwScope, errorObject.value)
+                errorObject = ObjException(throwScope, errorObject.value).apply { getStackTrace() }
             }
             if (!errorObject.isInstanceOf(ObjException.Root)) {
                 throwScope.raiseError("this is not an exception object: $errorObject")
@@ -1746,7 +1746,7 @@ class Compiler(
                     errorObject.message,
                     errorObject.extraData,
                     errorObject.useStackTrace
-                )
+                ).apply { getStackTrace() }
                 throwScope.raiseError(errorObject)
             } else {
                 val msg = errorObject.invokeInstanceMethod(sc, "message").toString(sc).value

lynglib/src/commonMain/kotlin/net/sergeych/lyng/ScopePool.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2025 Sergey S. Chernov real.sergeych@gmail.com
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ import net.sergeych.lyng.obj.Obj
 
 /**
  * Expect/actual portable scope frame pool. Used only when [PerfFlags.SCOPE_POOL] is true.
- * JVM actual provides a ThreadLocal-backed pool; other targets may use a simple global deque.
+ * Provides per-thread pooling on JVM, Android, and Native; global pooling on JS and Wasm.
  */
 expect object ScopePool {
     fun borrow(parent: Scope, args: Arguments, pos: Pos, thisObj: Obj): Scope

lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjException.kt

@@ -129,7 +129,9 @@ open class ObjException(
 
             override suspend fun callOn(scope: Scope): Obj {
                 val message = scope.args.getOrNull(0)?.toString(scope) ?: ObjString(name)
-                return ObjException(this, scope, message)
+                val ex = ObjException(this, scope, message)
+                ex.getStackTrace()
+                return ex
             }
 
             override fun toString(): String = name