feat(deps): update langchain ecosystem and add langsmith SDK

- Upgrade langchain packages to latest versions (langchain 1.2.10, langgraph 1.0.9, etc.)
- Add langsmith SDK for enhanced observability and tracing
- Update Pillow to 12.1.1 for image processing improvements
- Maintain compatibility with existing AI and automation framework

requirements.txt

@@ -30,24 +30,28 @@ truststore>=0.10.4; python_version >= '3.10'
 
 # Core AI and Automation Framework
 aiosqlite>=0.19.0
-langchain>=1.2.0
-langchain-core>=1.2.6
-langgraph>=1.0.5
-langgraph-checkpoint-sqlite>=3.0.1
-langgraph-checkpoint-postgres>=2.0.0
+langchain>=1.2.10
+langchain-core>=1.2.16
+langgraph>=1.0.9
+langgraph-checkpoint>=4.0.0
+langgraph-checkpoint-sqlite>=3.0.3
+langgraph-checkpoint-postgres>=3.0.4
 
 # Model Providers
-langchain-openai>=1.1.6
-langchain-anthropic>=1.3.1
-langchain-google-genai>=4.1.3
-langchain-aws>=1.2.0
+langchain-openai>=1.1.10
+langchain-anthropic>=1.3.4
+langchain-google-genai>=4.2.1
+langchain-aws>=1.3.1
 langchain-ollama>=1.0.1
 langchain-deepseek>=1.0.1
-langchain-xai>=1.2.1
+langchain-xai>=1.2.2
 
 # Token Counting
 tiktoken>=0.8.0
 
+# LangSmith SDK
+langsmith>=0.7.7
+
 # Network Automation
 netmiko>=4.6.0
 nornir>=3.5.0
@@ -74,4 +78,4 @@ psycopg-pool>=3.1.0
 typing-extensions>=4.15.0
 
 # Image Processing
-Pillow>=10.0.0
+Pillow>=12.1.1