fix(ci): install pyproject.toml runtime dependencies before packaging

The RPM and DEB workflows only installed pip and build, but never
the 10 runtime Python dependencies (polars, scikit-learn, psycopg,
paramiko, etc.).

Author: Peter-L-SVK

.github/workflows/build-deb.yml

@@ -46,6 +46,9 @@ jobs:
           pip install --upgrade pip
           pip install build
 
+      - name: Install project dependencies
+        run: pip install .
+
       - name: Build DEB
         run: |
           chmod +x scripts/packaging/build_deb.sh

.github/workflows/build-rpm.yml

@@ -44,6 +44,9 @@ jobs:
           pip install --upgrade pip
           pip install build
 
+      - name: Install project dependencies
+        run: pip install .
+
       - name: Build RPM
         run: |
           chmod +x scripts/packaging/build_rpm.sh