fix: restore test safety plugins and correct core SDK path in conftest

Register the test_gating and network_guard plugins via
config.pluginmanager.import_plugin() in pytest_configure, which is the
supported mechanism for non-top-level conftest files under pytest 9.1.1+.
This restores test gating and network-guard enforcement that was dropped
when pytest_plugins was removed.

Also fix the core SDK sys.path insertion: praisonaiagents lives at
src/praisonai-agents, so traverse two parents ('..','..') to reach
<root>/src, not three.

Co-authored-by: Mervin Praison <[email protected]>

src/praisonai/tests/conftest.py

@@ -6,12 +6,24 @@ import warnings
 import gc
 from unittest.mock import Mock, patch
 
-# Register pytest plugins
-pytest_plugins = (
-    'pytest_asyncio',
-    'tests._pytest_plugins.test_gating',
-    'tests._pytest_plugins.network_guard',
-)
+# NOTE: pytest 9.1.1+ forbids declaring `pytest_plugins` in a non-top-level
+# conftest.py. We register the local safety plugins here instead, which is the
+# supported mechanism for nested conftest files. This preserves the test gating
+# and network guard behaviour without triggering the collection error.
+def pytest_configure(config):
+    """Register local safety plugins for the PraisonAI test suite.
+
+    pytest-asyncio is loaded automatically via its entry point. The gating and
+    network-guard plugins are registered explicitly (they previously lived in a
+    module-level `pytest_plugins` tuple which is no longer allowed here).
+    """
+    for plugin_name in (
+        "tests._pytest_plugins.test_gating",
+        "tests._pytest_plugins.network_guard",
+    ):
+        if not config.pluginmanager.has_plugin(plugin_name):
+            config.pluginmanager.import_plugin(plugin_name)
+
 
 # Suppress aiohttp unclosed session warnings during tests
 warnings.filterwarnings("ignore", message="Unclosed client session")
@@ -44,14 +56,16 @@ def cleanup_async_resources():
     # Force garbage collection to clean up any lingering async resources
     gc.collect()
 
-# Add the source paths to sys.path for imports
-# praisonai-agents package (core SDK)
+# Add the source paths to sys.path for imports.
+# Layout: <root>/src/praisonai/tests/conftest.py, with the core SDK living at
+# <root>/src/praisonai-agents. From this file, '..', '..' reaches <root>/src.
 _agents_path = os.path.join(os.path.dirname(__file__), '..', '..', 'praisonai-agents')
-if _agents_path not in sys.path:
+if os.path.isdir(_agents_path) and _agents_path not in sys.path:
     sys.path.insert(0, _agents_path)
-# praisonai wrapper package
+
+# praisonai wrapper package: '..' reaches <root>/src/praisonai.
 _wrapper_path = os.path.join(os.path.dirname(__file__), '..')
-if _wrapper_path not in sys.path:
+if os.path.isdir(_wrapper_path) and _wrapper_path not in sys.path:
     sys.path.insert(0, _wrapper_path)
 
 @pytest.fixture