fix(mypy): remove stale type: ignore comments for langchain and crewai imports

CI installs langchain-core and crewai as dev dependencies, so mypy can
resolve these imports successfully. The import-not-found and misc ignores
are no longer needed and trigger warn_unused_ignores under strict mode.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Zie619

trusera_sdk/integrations/crewai.py

@@ -9,7 +9,7 @@
 logger = logging.getLogger(__name__)
 
 try:
-    from crewai import Agent, Task  # type: ignore[import-not-found]  # noqa: F401
+    from crewai import Agent, Task  # noqa: F401
 
     CREWAI_AVAILABLE = True
 except ImportError:

trusera_sdk/integrations/langchain.py

@@ -14,8 +14,8 @@
 _METADATA_TTL_SECONDS = 300  # 5 minutes
 
 try:
-    from langchain_core.callbacks import BaseCallbackHandler  # type: ignore[import-not-found]
-    from langchain_core.outputs import LLMResult  # type: ignore[import-not-found]
+    from langchain_core.callbacks import BaseCallbackHandler
+    from langchain_core.outputs import LLMResult
 
     LANGCHAIN_AVAILABLE = True
 except ImportError:
@@ -25,7 +25,7 @@
 
 if LANGCHAIN_AVAILABLE:
 
-    class TruseraCallbackHandler(BaseCallbackHandler):  # type: ignore[misc]
+    class TruseraCallbackHandler(BaseCallbackHandler):
         """
         LangChain callback handler that sends events to Trusera.