Update installation steps and dependencies

- Removed uv installation from workflows and Dockerfile.
- Consolidated tooling installations into a single step.
- Changed dependency installation to use requirements.txt instead of pyproject.toml.
- Set PYTHONPATH in the Dockerfile for module accessibility.

.github/workflows/main.yml

@@ -16,16 +16,14 @@ jobs:
         with:
           python-version: '3.13'
           
-      - name: Install uv
-        run: pip install uv
-      
+      - name: Install tooling
+        run: pip install wheel setuptools==77.0.3
+
       - name: Preinstall stringcase workaround
-        run: |
-          pip install wheel setuptools==77.0.3
-          pip install --no-use-pep517 'stringcase==1.2.0'
-      
-      - name: Install all dependencies from pyproject.toml
-        run: uv pip install --group default --system
+        run: pip install --no-use-pep517 'stringcase==1.2.0'
+
+      - name: Install project dependencies
+        run: pip install -r requirements.txt
 
       - name: Extract functionInputSchema
         id: extract_schema