ci: install libsqlcipher-dev before pip deps on GitHub CI

pysqlcipher3 is a C extension that links against libsqlcipher — not
present on ubuntu-latest by default. Mirrors what the Dockerfile already
does. backup.py uses it for encrypted DB export but never in CI tests.

.github/workflows/ci.yml

@@ -22,6 +22,9 @@ jobs:
           python-version: '3.12'
           cache: pip
 
+      - name: Install system dependencies
+        run: sudo apt-get install -y libsqlcipher-dev
+
       - name: Install circuitforge-core
         run: pip install git+https://git.opensourcesolarpunk.com/Circuit-Forge/circuitforge-core.git@main