Python: Replace wildcard imports with explicit imports (#3908)

* Python: Replace wildcard imports with explicit imports

- Replace all 'from ... import *' with explicit symbol imports
- Add __all__ declarations to namespace packages for re-exports
- Update CODING_STANDARD.md to prohibit wildcard imports
- Maintain exported API and preserve all functionality

fixes #3605

* Refine wildcard guidance example text

* Simplify explicit exports without self-aliases

python/packages/lab/namespace/agent_framework/lab/gaia/__init__.py

@@ -1,4 +1,28 @@
 # Copyright (c) Microsoft. All rights reserved.
 
 # Import and re-export from the actual implementation
-from agent_framework_lab_gaia import *  # noqa: F403
+from agent_framework_lab_gaia import (
+    GAIA,
+    Evaluation,
+    Evaluator,
+    GAIATelemetryConfig,
+    Prediction,
+    Task,
+    TaskResult,
+    TaskRunner,
+    gaia_scorer,
+    viewer_main,
+)
+
+__all__ = [
+    "GAIA",
+    "Evaluation",
+    "Evaluator",
+    "GAIATelemetryConfig",
+    "Prediction",
+    "Task",
+    "TaskResult",
+    "TaskRunner",
+    "gaia_scorer",
+    "viewer_main",
+]

python/packages/lab/namespace/agent_framework/lab/lightning/__init__.py

@@ -1,4 +1,6 @@
 # Copyright (c) Microsoft. All rights reserved.
 
 # Import and re-export from the actual implementation
-from agent_framework_lab_lightning import *  # noqa: F403
+from agent_framework_lab_lightning import AgentFrameworkTracer
+
+__all__ = ["AgentFrameworkTracer"]

python/packages/lab/namespace/agent_framework/lab/tau2/__init__.py

@@ -1,4 +1,20 @@
 # Copyright (c) Microsoft. All rights reserved.
 
 # Import and re-export from the actual implementation
-from agent_framework_lab_tau2 import *  # noqa: F403
+from agent_framework_lab_tau2 import (
+    ASSISTANT_AGENT_ID,
+    ORCHESTRATOR_ID,
+    USER_SIMULATOR_ID,
+    TaskRunner,
+    patch_env_set_state,
+    unpatch_env_set_state,
+)
+
+__all__ = [
+    "ASSISTANT_AGENT_ID",
+    "ORCHESTRATOR_ID",
+    "USER_SIMULATOR_ID",
+    "TaskRunner",
+    "patch_env_set_state",
+    "unpatch_env_set_state",
+]