Fix Dependabot alerts for router and struct2graph (#1982)

Signed-off-by: ZePan110 <ze.pan@intel.com>

Author: ZePan110

comps/router/src/requirements.in

@@ -6,11 +6,13 @@ fastapi
 httpx
 kubernetes
 langchain
-langchain-community
+langchain-core>=0.3.81
+langchain-community>=0.3.27
+langchain-text-splitters>=0.3.9
 opentelemetry-api
 opentelemetry-exporter-otlp
 opentelemetry-sdk
-pillow
+pillow>=11.3.0
 prometheus-fastapi-instrumentator
 pydantic
 pypdf
@@ -20,4 +22,6 @@ pyyaml
 requests
 semantic-router
 shortuuid
+starlette>=0.49.1
+urllib3>=2.6.0
 uvicorn[standard]