fix(pydantic-ai): Make imports defensive to avoid ModuleNotFoundError (#5135)

Closes #5134

Author: alexander-alderman-webb

sentry_sdk/integrations/pydantic_ai/patches/agent_run.py

@@ -1,12 +1,17 @@
 from functools import wraps
 
 import sentry_sdk
+from sentry_sdk.integrations import DidNotEnable
 
 from ..spans import invoke_agent_span, update_invoke_agent_span
 from ..utils import _capture_exception, pop_agent, push_agent
 
 from typing import TYPE_CHECKING
-from pydantic_ai.agent import Agent  # type: ignore
+
+try:
+    from pydantic_ai.agent import Agent  # type: ignore
+except ImportError:
+    raise DidNotEnable("pydantic-ai not installed")
 
 if TYPE_CHECKING:
     from typing import Any, Callable, Optional

sentry_sdk/integrations/pydantic_ai/patches/graph_nodes.py

@@ -2,12 +2,17 @@
 from functools import wraps
 
 import sentry_sdk
+from sentry_sdk.integrations import DidNotEnable
 
 from ..spans import (
     ai_client_span,
     update_ai_client_span,
 )
-from pydantic_ai._agent_graph import ModelRequestNode  # type: ignore
+
+try:
+    from pydantic_ai._agent_graph import ModelRequestNode  # type: ignore
+except ImportError:
+    raise DidNotEnable("pydantic-ai not installed")
 
 from typing import TYPE_CHECKING
 

sentry_sdk/integrations/pydantic_ai/patches/model_request.py

@@ -1,7 +1,12 @@
 from functools import wraps
 from typing import TYPE_CHECKING
 
-from pydantic_ai import models  # type: ignore
+from sentry_sdk.integrations import DidNotEnable
+
+try:
+    from pydantic_ai import models  # type: ignore
+except ImportError:
+    raise DidNotEnable("pydantic-ai not installed")
 
 from ..spans import ai_client_span, update_ai_client_span
 

sentry_sdk/integrations/pydantic_ai/patches/tools.py

@@ -1,7 +1,6 @@
 from functools import wraps
 
-from pydantic_ai._tool_manager import ToolManager  # type: ignore
-
+from sentry_sdk.integrations import DidNotEnable
 import sentry_sdk
 
 from ..spans import execute_tool_span, update_execute_tool_span
@@ -22,6 +21,11 @@
 except ImportError:
     HAS_MCP = False
 
+try:
+    from pydantic_ai._tool_manager import ToolManager  # type: ignore
+except ImportError:
+    raise DidNotEnable("pydantic-ai not installed")
+
 
 def _patch_tool_execution():
     # type: () -> None