fix(native): retain valid Objective-C properties beside a malformed record (#3833)

* fix(native): retain valid Objective-C properties beside a malformed record

readObjcPropertyList decoded a whole property_list_t in one operation.
When a later entry's name pointer was unmapped, the list-level catch
discarded the properties already decoded. An empty property name passed
decoding and then failed schema validation of the whole result, so
inspect-native-dispatch-metadata exited 1 with no metadata.

Each property_t entry is now decoded on its own. A failing entry, or an
empty name, becomes a property_decode_failed issue at the entry address,
and sibling properties are retained. Incomplete-attribute issues also
report their entry address. List-header failures still fail only that
list.

Fixes #3336

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* test(native): cover property record isolation on every platform

Move the synthetic Objective-C property Mach-O into a shared fixture and
decode it through decodeAppleDispatchMetadata in a portable test, so
Linux and Windows runs also catch a regression that drops valid sibling
properties. The macOS CLI cases keep exercising the built command.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

docs/native-investigation.md

@@ -380,7 +380,10 @@ complete observation.
   missing or incomplete attribute metadata leaves `atomicity` and any
   unestablished read-only value null. A type attribute whose quoted class name
   never closes is incomplete and marks `objc_properties_categories` partial
-  with `property_attributes_incomplete`. `is_meta_class`, `is_root_class`, and
+  with `property_attributes_incomplete`. A property record that cannot be
+  decoded, such as one with an empty or unmapped name, is reported as
+  `property_decode_failed` at its entry address while sibling properties are
+  retained. `is_meta_class`, `is_root_class`, and
   `ivar_count` are also nullable when the selected provider exposes only symbol
   names. Class implementation methods have null `is_required` and `is_optional`
   fields because those facts apply to protocol declarations; decoded protocol