Property support wrapped values

[superstar54]

Each property type declares allowed_types and values are validated when assigned.

In some runtimes, users may store values using wrapper objects (for example an ORM data node that exposes a Python value via .value).
To support this without hardcoding third-party dependencies, TaskProperty.validate accepts a value if any of these match allowed_types:

• the value itself
• value.__wrapped__ (if present)
• value.value (if present)
• values returned by any registered validation adapters

External packages (e.g. an engine) can register adapters globally:

   from node_graph.property import TaskProperty

   def unwrap_custom(value):
       if hasattr(value, "get_list") and callable(value.get_list):
           return value.get_list()
       return TaskProperty.NOT_ADAPTED

   TaskProperty.register_validation_adapter(unwrap_custom)

[codecov]

Codecov Report

❌ Patch coverage is 86.72199% with 32 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.47%. Comparing base (a88d2fd) to head (980d686).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/node_graph/utils/json_utils.py	65.78%	13 Missing ⚠️
src/node_graph/property.py	81.81%	6 Missing ⚠️
src/node_graph/knowledge/visualization.py	92.53%	5 Missing ⚠️
src/node_graph/knowledge/graph.py	91.66%	4 Missing ⚠️
src/node_graph/properties/builtins.py	87.50%	2 Missing ⚠️
src/node_graph/semantics.py	50.00%	1 Missing ⚠️
tests/test_property_validation.py	94.73%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #135      +/-   ##
==========================================
- Coverage   90.65%   90.47%   -0.18%     
==========================================
  Files          74       78       +4     
  Lines        7713     7825     +112     
==========================================
+ Hits         6992     7080      +88     
- Misses        721      745      +24     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.