fix(javascript): preserve final RPC property and source-body ownership

Normalize exact template and bigint keys at the shared AST boundary. Keep overwritten GraphQL body literals owned by their source object so they cannot resurface as standalone operations.

Reviewed-PR: #3244
Co-authored-by: Vaishnavi220506 <vaishnaviharish2006@gmail.com>

src/domain/javascript/javascriptAstValues.ts

@@ -81,6 +81,20 @@ export const semanticStaticPropertyKey = (
   property = unwrapJavaScriptExpression(property).node;
   if (t.isStringLiteral(property) || t.isNumericLiteral(property))
     return String(property.value);
+  if (t.isBigIntLiteral(property)) return String(property.value);
+  if (
+    t.isUnaryExpression(property, { operator: "-" }) &&
+    t.isBigIntLiteral(property.argument)
+  )
+    return String(-BigInt(property.argument.value));
+  if (
+    t.isTemplateLiteral(property) &&
+    property.expressions.length === 0 &&
+    property.quasis.length === 1
+  ) {
+    const cooked = property.quasis[0]?.value.cooked;
+    return cooked === null || cooked === undefined ? null : cooked;
+  }
   return !computed && t.isIdentifier(property) ? property.name : null;
 };