build: add structlog dep to base package (#9516)

Add structlog dep to base package

.github/workflows/cross-platform-test.yml

@@ -256,7 +256,8 @@ jobs:
       - name: Test CLI help command (Windows)
         if: matrix.os == 'windows'
         run: |
-          test-env\Scripts\python.exe -m langflow --help
+          call test-env\Scripts\activate.bat
+          python -m langflow --help
         shell: cmd
 
       - name: Test CLI help command (Unix)
@@ -508,7 +509,8 @@ jobs:
       - name: Test CLI help command (Windows)
         if: matrix.os == 'windows'
         run: |
-          test-env\Scripts\python.exe -m langflow --help
+          call test-env\Scripts\activate.bat
+          python -m langflow --help
         shell: cmd
 
       - name: Test CLI help command (Unix)

src/backend/base/pyproject.toml

@@ -27,6 +27,7 @@ dependencies = [
     "langchain-core~=0.3.45",
     "langchainhub~=0.1.15",
     "loguru>=0.7.1,<1.0.0",
+    "structlog>=25.4.0",
     "rich>=13.7.0,<14.0.0",
     "langchain-experimental>=0.3.4,<1.0.0",
     "sqlmodel==0.0.22",