fix: fix + test for missing deps in pip install test (#278)

#### Relevant issue or PR
n/a

#### Description of changes
☝️ 

#### Testing done
CI

---------

Co-authored-by: Niklas Heim <niklas.heim@simulation.science>

Author: dionhaefner

.github/workflows/test_pip_install.yml

@@ -3,9 +3,6 @@ name: Test installation via pip
 on:
     # run on PRs for validation
     pull_request:
-      paths:
-        - 'requirements.txt'
-
 
 jobs:
   test-pip-install:
@@ -19,6 +16,9 @@ jobs:
         python-version:
           - "3.10"
           - "3.13"
+
+      fail-fast: false
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -32,3 +32,7 @@ jobs:
         run: |
           pip install -r requirements.txt
           pip install --no-deps .
+
+      - name: Ensure CLI is usable (no missing deps)
+        run: |
+          tesseract --help

tesseract_core/sdk/tesseract.py

@@ -18,8 +18,6 @@
 from pydantic import BaseModel, TypeAdapter, ValidationError
 from pydantic_core import InitErrorDetails
 
-from tesseract_core.runtime.config import update_config
-
 from . import engine
 
 PathLike = str | Path
@@ -181,6 +179,8 @@ def from_tesseract_api(
         Returns:
             A Tesseract instance.
         """
+        from tesseract_core.runtime.config import update_config
+
         if isinstance(tesseract_api, str | Path):
             from tesseract_core.runtime.core import load_module_from_path